a(603)=???
a(604)=9
a(605)=23
a(606)=2
a(607)=64
a(608)=2
a(609)=1
a(610)=1
a(611)=3
a(612)=1
a(613)=1
a(614)=9
a(615)=1
a(616)=3
a(617)=???
a(618)=5
a(619)=3
a(620)=2
a(621)=1
a(622)=1
a(623)=2
a(624)=4
a(625)=3
a(626)=29
a(627)=1
a(628)=82
a(629)=5
a(630)=1
a(631)=1
a(632)=2
a(633)=2
a(634)=7
a(635)=5
a(636)=1
a(637)=4
a(638)=753
a(639)=8
a(640)=15
a(641)=11
a(642)=1
a(643)=390
a(644)=11
a(645)=1
a(646)=6
a(647)=3
a(648)=1
a(649)=1
a(650)=2
a(651)=2
a(652)=1
a(653)=3
a(654)=7
a(655)=1
a(656)=6
a(657)=1
a(658)=1
a(659)=15
a(660)=29
a(661)=192
a(662)=3
a(663)=5
a(664)=594
a(665)=3
a(666)=1
a(667)=4
a(668)=3
a(669)=1
a(670)=1
a(671)=209
a(672)=2
a(673)=3
a(674)=2
a(675)=2
a(676)=1
a(677)=3
a(678)=1
a(679)=1
a(680)=6
a(681)=2
a(682)=133
a(683)=2
a(684)=1
a(685)=4
a(686)=2
a(687)=1
a(688)=3
a(689)=5
a(690)=2
a(691)=1
a(692)=6
a(693)=5
a(694)=4
a(695)=3
a(696)=1
a(697)=1
a(698)=3
a(699)=1
a(700)=1
a(701)=2
a(702)=4
a(703)=4
a(704)=3
a(705)=4
a(706)=4
a(707)=3
a(708)=???
a(709)=6
a(710)=2
a(711)=5
a(712)=1
a(713)=5
a(714)=2
a(715)=1
a(716)=12
a(717)=2
a(718)=19
a(719)=5
a(720)=8
a(721)=1
a(722)=2
a(723)=14
a(724)=3
a(725)=3
a(726)=11
a(727)=4
a(728)=23
a(729)=2
a(730)=3
a(731)=6
a(732)=1
a(733)=1
a(734)=5
a(735)=1
a(736)=3
a(737)=3
a(738)=118
a(739)=3
a(740)=1955
a(741)=1
a(742)=3
a(743)=2
a(744)=2
a(745)=1
a(746)=2
a(747)=13
a(748)=1
a(749)=???
a(750)=2
a(751)=6
a(752)=2
a(753)=47
a(754)=1
a(755)=2
a(756)=1
a(757)=3
a(758)=3
a(759)=1
a(760)=12
a(761)=11
a(762)=1
a(763)=3
a(764)=3
a(765)=2
a(766)=3
a(767)=3
a(768)=1
a(769)=1
a(770)=3
a(771)=8
a(772)=12
a(773)=54
a(774)=1
a(775)=4
a(776)=2
a(777)=2
a(778)=3
a(779)=3
a(780)=13
a(781)=3
a(782)=6
a(783)=2
a(784)=1
a(785)=2
a(786)=4
a(787)=12
a(788)=8
a(789)=23
a(790)=1
a(791)=2
a(792)=7
a(793)=124
a(794)=2
a(795)=1
a(796)=7
a(797)=8
a(798)=2
a(799)=9
a(800)=11
a(801)=1
a(802)=18
a(803)=11
a(804)=20
a(805)=3
a(806)=2
a(807)=4
a(808)=1
a(809)=2
a(810)=1
a(811)=1
a(812)=11
a(813)=4
a(814814,
a(815)=18
a(816)=1
a(817)=1
a(818)=74
a(819)=1
a(820)=4
a(821)=11
a(822)=1
a(823)=1
a(824)=5
a(825)=161
a(826)=4
a(827)=54
a(828)=2
a(829)=1
a(830)=3
a(831)=1
a(832)=4
a(833)=2
a(834)=22
a(835)=4
a(836)=17
a(837)=38
a(838)=6
a(839)=2
a(840)=2
a(841)=4
a(842)=2
a(843)=1
a(844)=3
a(845)=3
a(846)=1
a(847)=249
a(848)=2
a(849)=35
a(850)=1
a(851)=5
a(852)=1
a(853)=6
a(854)=2
a(855)=14
a(856)=3
a(857)=2
a(858)=1
a(859)=48
a(860)=2
a(861)=2
a(862)=1221
a(863)=2
a(864)=1
a(865)=13
a(866)=5
a(867)=2
a(868)=1
a(869)=1569
a(870)=2
a(871)=148
a(872)=2
a(873)=1
a(874)=1
a(875)=2
a(876)=1
a(877)=3
a(878)=2
a(879)=2
a(880)=45
a(881)=12
a(882)=1
a(883)=1
a(884)=2
a(885)=4
a(886)=1
a(887)=9
a(888)=2
a(889)=10
a(890)=3
a(891)=5
a(892)=6
a(893)=3
a(894)=1
a(895)=1
a(896)=2
a(897)=1
a(898)=4
a(899)=5
a(900)=1
a(901)=1
a(902)=1931
a(903)=10
a(904)=1
a(905)=2
a(906)=4
a(907)=3
a(908)=9
a(909)=1
a(910)=16
a(911)=3
a(912)=5
a(913)=9
a(914)=2
a(915)=1
a(916)=1
a(917)=2
a(918)=1
a(919)=3
a(920)=9
a(921)=2
a(922)=1
a(923)=2
a(924)=1
a(925)=10
a(926)=3
a(927)=4
a(928)=1
a(929)=6
a(930)=5
a(931)=1
a(932)=20
a(933)=4
a(934)=1
a(935)=23
a(936)=???
a(937)=1
a(938)=2
a(939)=1
a(940)=18
a(941)=2
a(942)=1
a(943)=1
a(944)=6
a(945)=4
a(946)=1
a(947)=14
a(948)=2
a(949)=1
a(950)=3
a(951)=1
a(952)=1
a(953)=2
a(954)=46
a(955)=1
a(956)=6
a(957)=5
a(958)=6
a(959)=2
a(960)=1
a(961)=6
a(962)=2
a(963)=1
a(964)=6
a(965)=14
a(966)=1
a(967)=3
a(968)=3
a(969)=2
a(970)=3
a(971)=3
a(972)=1
a(973)=1437
a(974)=18
a(975)=2
a(976)=13
a(977)=2
a(978)=1
a(979)=1
a(980)=2
a(981)=1
a(982)=6
a(983)=6
a(984)=2
a(985)=1
a(986)=8
a(987)=1
a(988)=3
a(989)=2
a(990)=1
a(991)=6
a(992)=3
a(993)=1
a(994)=1
a(995)=2100
a(996)=2
a(997)=3
a(998)=3
a(999)=7
a(1000)=13
a(1001)=9
a(1002)=4
a(1003)=3
a(1004)=2
a(1005)=2
a(1006)=1
a(1007)=6
a(1008)=2
a(1009)=1
a(1010)=6
a(1011)=1
a(1012)=9
a(1013)=6
a(1014)=1
a(1015)=1
a(1016)=2
a(1017)=4
a(1018)=1
a(1019)=5
a(1020)=7
a(1021)=1
a(1022)=17
a(1023)=???
a(1024)=18
a(1025)=3
a(1026)=2
a(1027)=1
a(1028)=2
a(1029)=2
a(1030)=1
a(1031)=5
a(1032)=1
a(1033)=1
a(1034)=47
a(1035)=2
a(1036)=4
a(1037)=18
a(1038)=2
a(1039)=1
a(1040)=11
a(1041)=43
a(1042)=25
a(1043)=2
a(1044)=86
a(1045)=3
a(1046)=426
a(1047)=2
a(1048)=7
a(1049)=2
a(1050)=1
a(1051)=6
a(1052)=2
a(1053)=1
a(1054)=99
a(1055)=6
a(1056)=13
a(1057)=4
a(1058)=14
a(1059)=4
a(1060)=1
a(1061)=5
a(1062)=287
a(1063)=1
a(1064)=2
a(1065)=1
a(1066)=3
a(1067)=15
a(1068)=506
a(1069)=1
a(1070)=14
a(1071)=1
a(1072)=6
a(1073)=8
a(1074)=4
a(1075)=6
a(1076)=3
a(1077)=1
a(1078)=1
a(1079)=620
a(1080)=2
a(1081)=4
a(1082)=2
a(1083)=1
a(1084)=18
a(1085)=3
a(1086)=1
a(1087)=24
a(1088)=5
a(1089)=1
a(1090)=66
a(1091)=2
a(1092)=2
a(1093)=3
a(1094)=5
a(1095)=10
a(1096)=12
a(1097)=3
a(1098)=22
a(1099)=4
a(1100)=???
a(1101)=16
a(1102)=3
a(1103)=2
a(1104)=4
a(1105)=4
a(1106)=8
a(1107)=1
a(1108)=6
a(1109)=8
a(1110)=8
a(1111)=15
a(1112)=2
a(1113)=1
a(1114)=3
a(1115)=6
a(1116)=1
a(1117)=1
a(1118)=45
a(1119)=56
a(1120)=4
a(1121)=2
a(1122)=77
a(1123)=4
a(1124)=9
a(1125)=1
a(1126)=1
a(1127)=3
a(1128)=10
a(1129)=3
a(1130)=2
a(1131)=1
a(1132)=1
a(1133)=59
a(1134)=50
a(1135)=1
a(1136)=3
a(1137)=5
a(1138)=12
a(1139)=???
a(1140)=4
a(1141)=1
a(1142)=9
a(1143)=2
a(1144)=7
a(1145)=20
a(1146)=805
a(1147)=1
a(1148)=3
a(1149)=1
a(1150)=4
a(1151)=5
a(1152)=2
a(1153)=4
a(1154)=6
a(1155)=1
a(1156)=6
a(1157)=3
a(1158)=2
a(1159)=7
a(1160)=3
a(1161)=8
a(1162)=1
a(1163)=3
a(1164)=2
a(1165)=4
a(1166)=5
a(1167)=???
a(1168)=1
a(1169)=2
a(1170)=1
a(1171)=3
a(1172)=3
a(1173)=1
a(1174)=19
a(1175)=2
a(1176)=4
a(1177)=1771
a(1178)=2
a(1179)=2
a(1180)=1
a(1181)=5
a(1182)=1
a(1183)=1
a(1184)=2
a(1185)=16
a(1186)=3
a(1187)=3
a(1188)=5
a(1189)=4
a(1190)=8
a(1191)=4
a(1192)=9
a(1193)=2
a(1194)=1
a(1195)=18
a(1196)=2
a(1197)=1
a(1198)=1
a(1199)=5
a(1200)=2
a(1201)=1
a(1202)=5
a(1203)=4
a(1204)=1
a(1205)=2
a(1206)=4
a(1207)=1
a(1208)=2
a(1209)=4
a(1210)=1
a(1211)=134
a(1212)=14
a(1213)=54
a(1214)=6
a(1215)=5
a(1216)=1
a(1217)=2
a(1218)=4
a(1219)=3
a(1220)=2
a(1221)=1
a(1222)=???
a(1223)=624
a(1224)=1
a(1225)=1
a(1226)=2
a(1227)=14
a(1228)=1
a(1229)=35
a(1230)=1
a(1231)=18
a(1232)=147
a(1233)=2
a(1234)=4
a(1235)=201
a(1236)=31
a(1237)=9
a(1238)=5
a(1239)=1
a(1240)=1
a(1241)=5
a(1242)=1
a(1243)=3
a(1244)=???
a(1245)=1
a(1246)=21
a(1247)=6
a(1248)=5
a(1249)=1
a(1250)=8
a(1251)=1
a(1252)=10
a(1253)=2
a(1254)=1
a(1255)=4
a(1256)=6
a(1257)=2
a(1258)=4
a(1259)=396
a(1260)=1
a(1261)=1
a(1262)=2
a(1263)=2
a(1264)=1
a(1265)=3
a(1266)=2
a(1267)=1
a(1268)=18
a(1269)=11
a(1270)=3
a(1271)=3
a(1272)=1
a(1273)=10
a(1274)=3
a(1275)=49
a(1276)=33
a(1277)=2
a(1278)=1
a(1279)=1
a(1280)=5
a(1281)=2
a(1282)=1
a(1283)=2
a(1284)=1
a(1285)=3
a(1286)=17
a(1287)=29
a(1288)=16
a(1289)=3
a(1290)=2
a(1291)=1
a(1292)=6
a(1293)=4
a(1294)=1
a(1295)=158
a(1296)=16
a(1297)=4
a(1298)=3
a(1299)=26
a(1300)=1
a(1301)=12
a(1302)=2
a(1303)=9
a(1304)=2
a(1305)=11
a(1306)=9
a(1307)=5
a(1308)=2
a(1309)=207
a(1310)=2
a(1311)=2
a(1312)=1
a(1313)=2
a(1314)=265
a(1315)=1
a(1316)=2
a(1317)=1
a(1318)=10
a(1319)=17
a(1320)=5
a(1321)=4
a(1322)=12
a(1323)=16
a(1324)=1
a(1325)=2
a(1326)=2
a(1327)=3
a(1328)=3
a(1329)=1
a(1330)=3
a(1331)=2889
a(1332)=4
a(1333)=1
a(1334)=3
a(1335)=5
a(1336)=6
a(1337)=2
a(1338)=1
a(1339)=3
a(1340)=32
a(1341)=1
a(1342)=1
a(1343)=6
a(1344)=1
a(1345)=1
a(1346)=17
a(1347)=8
a(1348)=3
a(1349)=17
a(1350)=8
a(1351)=3
a(1352)=2
a(1353)=???
a(1354)=52
a(1355)=2
a(1356)=52
a(1357)=7
a(1358)=3
a(1359)=1
a(1360)=4
a(1361)=2
a(1362)=5
a(1363)=6
a(1364)=17
a(1365)=2
a(1366)=6
a(1367)=2
a(1368)=1
a(1369)=1
a(1370)=3
a(1371)=1
a(1372)=1
a(1373)=14
a(1374)=11
a(1375)=1
a(1376)=14
a(1377)=22
a(1378)=1
a(1379)=2
a(1380)=50
a(1381)=3
a(1382)=9
a(1383)=1
a(1384)=1
a(1385)=2
a(1386)=7
a(1387)=6
a(1388)=5
a(1389)=25
a(1390)=1
a(1391)=23
a(1392)=1
a(1393)=1
a(1394)=1934
a(1395)=2
a(1396)=15
a(1397)=15
a(1398)=4
a(1399)=6
a(1400)=15
a(1401)=1
a(1402)=42
a(1403)=5
a(1404)=2
a(1405)=1
a(1406)=2
a(1407)=1
a(1408)=1
a(1409)=6
a(1410)=13
a(1411)=7
a(1412)=5
a(1413)=2
a(1414)=7
a(1415)=2
a(1416)=4
a(1417)=99
a(1418)=2
a(1419)=181
a(1420)=4
a(1421)=2
a(1422)=1
a(1423)=3
a(1424)=6
a(1425)=1
a(1426)=3
a(1427)=2
a(1428)=1
a(1429)=4
a(1430)=9
a(1431)=2
a(1432)=1
a(1433)=45
a(1434)=1
a(1435)=3
a(1436)=3
a(1437)=2
a(1438)=4
a(1439)=3
a(1440)=1
a(1441)=1
a(1442)=614
a(1443)=1
a(1444)=3
a(1445)=2
a(1446)=1
a(1447)=4
a(1448)=5
a(1449)=4
a(1450)=13
a(1451)=15
a(1452)=5
a(1453)=6
a(1454)=12
a(1455)=1
a(1456)=1
a(1457)=3
a(1458)=4
a(1459)=1
a(1460)=2
a(1461)=4
a(1462)=1
a(1463)=11
a(1464)=8
a(1465)=9
a(1466)=3
a(1467)=7
a(1468)=4
a(1469)=5
a(1470)=2
a(1471)=72
a(1472)=2
a(1473)=1
a(1474)=1
a(1475)=1206
a(1476)=11
a(1477)=1
a(1478)=2
a(1479)=4
a(1480)=205
a(1481)=15
a(1482)=1
a(1483)=1
a(1484)=2
a(1485)=1
a(1486)=6
a(1487)=2
a(1488)=5
a(1489)=1
a(1490)=2
a(1491)=2
a(1492)=3
a(1493)=8
a(1494)=2
a(1495)=1
a(1496)=3
a(1497)=2
a(1498)=4
a(1499)=2
a(1500)=2
a(1501)=6
a(1502)=2
a(1503)=1
a(1504)=6
a(1505)=3
a(1506)=1
a(1507)=3
a(1508)=8
a(1509)=1
a(1510)=1
a(1511)=20
a(1512)=1
a(1513)=1
a(1514)=17
a(1515)=58
a(1516)=1
a(1517)=47
a(1518)=31
a(1519)=???
a(1520)=8
a(1521)=2
a(1522)=3
a(1523)=2
a(1524)=1
a(1525)=12
a(1526)=32
a(1527)=1
a(1528)=6
a(1529)=5
a(1530)=???
a(1531)=3
a(1532)=14
a(1533)=1
a(1534)=4
a(1535)=2
a(1536)=1
a(1537)=6
a(1538)=3
a(1539)=1
a(1540)=1
a(1541)=2
a(1542)=2
a(1543)=3
a(1544)=12
a(1545)=1
a(1546)=1
a(1547)=201
a(1548)=8
a(1549)=46
a(1550)=5
a(1551)=1
a(1552)=6
a(1553)=11
a(1554)=1
a(1555)=1
a(1556)=18
a(1557)=5
a(1558)=1
a(1559)=5
a(1560)=1
a(1561)=3
a(1562)=3
a(1563)=8
a(1564)=1
a(1565)=2
a(1566)=1
a(1567)=1
a(1568)=9
a(1569)=4
a(1570)=15
a(1571)=6
a(1572)=2
a(1573)=1
a(1574)=2
a(1575)=8
a(1576)=1
a(1577)=39
a(1578)=14
a(1579)=1
a(1580)=18
a(1581)=5
a(1582)=4
a(1583)=12
a(1584)=107
a(1585)=10
a(1586)=2
a(1587)=13
a(1588)=1
a(1589)=5
a(1590)=1
a(1591)=118
a(1592)=3
a(1593)=2
a(1594)=3
a(1595)=311
a(1596)=4
a(1597)=1
a(1598)=2
a(1599)=1
a(1600)=1
a(1601)=27
a(1602)=11
a(1603)=3
a(1604)=3
a(1605)=11
a(1606)=1
a(1607)=2
a(1608)=4
a(1609)=1
a(1610)=14
a(1611)=1
a(1612)=3
a(1613)=12
a(1614)=1
a(1615)=21
a(1616)=2
a(1617)=5
a(1618)=16
a(1619)=2
a(1620)=2
a(1621)=18
a(1622)=11
a(1623)=1
a(1624)=3
a(1625)=8
a(1626)=2
a(1627)=3
a(1628)=5
a(1629)=46
a(1630)=1
a(1631)=5
a(1632)=2
a(1633)=4
a(1634)=2
a(1635)=5
a(1636)=1
a(1637)=11
a(1638)=1
a(1639)=9
a(1640)=2
a(1641)=1
a(1642)=1
a(1643)=9
a(1644)=4
a(1645)=1
a(1646)=3
a(1647)=4
a(1648)=1
a(1649)=2
a(1650)=5
a(1651)=10
a(1652)=2
a(1653)=2
a(1654)=3
a(1655)=2
a(1656)=1
a(1657)=10
a(1658)=2
a(1659)=23
a(1660)=3
a(1661)=3
a(1662)=20
a(1663)=1
a(1664)=141
a(1665)=1
a(1666)=1
a(1667)=8
a(1668)=4
a(1669)=1
a(1670)=6
a(1671)=4
a(1672)=???
a(1673)=2
a(1674)=1
a(1675)=3
a(1676)=2
a(1677)=2
a(1678)=3
a(1679)=2
a(1680)=5
a(1681)=1
a(1682)=2
a(1683)=1
a(1684)=132
a(1685)=3
a(1686)=4
a(1687)=1
a(1688)=8
a(1689)=5
a(1690)=1
a(1691)=2
a(1692)=1
a(1693)=1
a(1694)=167
a(1695)=22
a(1696)=6
a(1697)=8
a(1698)=1
a(1699)=3
a(1700)=5
a(1701)=1
a(1702)=1
a(1703)=15
a(1704)=1
a(1705)=3
a(1706)=144
a(1707)=2
a(1708)=13
a(1709)=6
a(1710)=5
a(1711)=6
a(1712)=8
a(1713)=11
a(1714)=7
a(1715)=5
a(1716)=7
a(1717)=10
a(1718)=2
a(1719)=1
a(1720)=6
a(1721)=12
a(1722)=23
a(1723)=1
a(1724)=2
a(1725)=14
a(1726)=115
a(1727)=119
a(1728)=8
a(1729)=1
a(1730)=12
a(1731)=10
a(1732)=1
a(1733)=294
a(1734)=1
a(1735)=1
a(1736)=59
a(1737)=64
a(1738)=81
a(1739)=80
a(1740)=1
a(1741)=3
a(1742)=5
a(1743)=1
a(1744)=3
a(1745)=3
a(1746)=8
a(1747)=1
a(1748)=12
a(1749)=1
a(1750)=???
a(1751)=15
a(1752)=2
a(1753)=9
a(1754)=2
a(1755)=1
a(1756)=37
a(1757)=20
a(1758)=1
a(1759)=4
a(1760)=15
a(1761)=???
a(1762)=7
a(1763)=8
a(1764)=10
a(1765)=6
a(1766)=2
a(1767)=2
a(1768)=1
a(1769)=3
a(1770)=2
a(1771)=21
a(1772)=2
a(1773)=5
a(1774)=4
a(1775)=2
a(1776)=1
a(1777)=10
a(1778)=2
a(1779)=1
a(1780)=4
a(1781)=9
a(1782)=37
a(1783)=12
a(1784)=5
a(1785)=1
a(1786)=13
a(1787)=12
a(1788)=1
a(1789)=1
a(1790)=3
a(1791)=1
a(1792)=1
a(1793)=???
a(1794)=2
a(1795)=16
a(1796)=3
a(1797)=1
a(1798)=1
a(1799)=5
a(1800)=1042
a(1801)=24
a(1802)=2
a(1803)=2
a(1804)=1
a(1805)=2
a(1806)=1
a(1807)=4
a(1808)=2
a(1809)=8
a(1810)=7
a(1811)=9
a(1812)=1
a(1813)=1
a(1814)=6
a(1815)=17
a(1816)=4
a(1817)=2
a(1818)=1
a(1819)=1
a(1820)=2
a(1821)=1
a(1822)=28
a(1823)=41
a(1824)=20
a(1825)=1
a(1826)=17
a(1827)=2
a(1828)=4
a(1829)=20
a(1830)=1
a(1831)=1
a(1832)=5
a(1833)=10
a(1834)=1
a(1835)=2
a(1836)=2
a(1837)=1
a(1838)=18
a(1839)=5
a(1840)=1
a(1841)=2
a(1842)=2
a(1843)=3
a(1844)=3
a(1845)=1
a(1846)=1
a(1847)=2
a(1848)=1
a(1849)=4
a(1850)=23
a(1851)=13
a(1852)=1
a(1853)=6
a(1854)=1
a(1855)=16
a(1856)=446
a(1857)=2
a(1858)=19
a(1859)=3
a(1860)=28
a(1861)=???
a(1862)=2
a(1863)=2
a(1864)=3
a(1865)=9
a(1866)=1
a(1867)=1
a(1868)=11
a(1869)=1
a(1870)=1
a(1871)=2
a(1872)=2
a(1873)=1
a(1874)=3
a(1875)=11
a(1876)=16
a(1877)=2
a(1878)=35
a(1879)=12
a(1880)=2
a(1881)=185
a(1882)=4
a(1883)=2
a(1884)=13
a(1885)=4
a(1886)=8
a(1887)=2
a(1888)=33
a(1889)=2
a(1890)=2
a(1891)=1
a(1892)=35
a(1893)=2
a(1894)=9
a(1895)=15
a(1896)=5
a(1897)=4
a(1898)=1605
a(1899)=80
a(1900)=1
a(1901)=24
a(1902)=5
a(1903)=1
a(1904)=???
a(1905)=1
a(1906)=16
a(1907)=2
a(1908)=1
a(1909)=3
a(1910)=41
a(1911)=10
a(1912)=1
a(1913)=14
a(1914)=1
a(1915)=6
a(1916)=48
a(1917)=7
a(1918)=1
a(1919)=2
a(1920)=46
a(1921)=1
a(1922)=3
a(1923)=1
a(1924)=10
a(1925)=33
a(1926)=2
a(1927)=3
a(1928)=2
a(1929)=23
a(1930)=1
a(1931)=5
a(1932)=4
a(1933)=16
a(1934)=29
a(1935)=8
a(1936)=3
a(1937)=???
a(1938)=1
a(1939)=1
a(1940)=9
a(1941)=5
a(1942)=1
a(1943)=12
a(1944)=1
a(1945)=16
a(1946)=17
a(1947)=1
a(1948)=30
a(1949)=2
a(1950)=1
a(1951)=15
a(1952)=20
a(1953)=1
a(1954)=1
a(1955)=2
a(1956)=11
a(1957)=1
a(1958)=23
a(1959)=4
a(1960)=3
a(1961)=2
a(1962)=988
a(1963)=3
a(1964)=14
a(1965)=7
a(1966)=1
a(1967)=9
a(1968)=1
a(1969)=3
a(1970)=6
a(1971)=11
a(1972)=3
a(1973)=2
a(1974)=5
a(1975)=1
a(1976)=8
a(1977)=2
a(1978)=3
a(1979)=5
a(1980)=1
a(1981)=100
a(1982)=3
a(1983)=11
a(1984)=1
a(1985)=5
a(1986)=1
a(1987)=7
a(1988)=2
a(1989)=1
a(1990)=3
a(1991)=5
a(1992)=2
a(1993)=4
a(1994)=2
a(1995)=155
a(1996)=1
a(1997)=3
a(1998)=2
a(1999)=1
a(2000)=6