id
stringlengths
7
11
seq
listlengths
1
347
keywords
listlengths
1
8
A378383
[ 0, 0, 0, 1, 5, 19, 64, 202, 612, 1803, 5206, 14809, 41650, 116114, 321478, 885169, 2426462, 6627499, 18048088, 49026874, 132901176, 359625015, 971639014, 2621683741, 7065545950, 19022080034, 51163908874, 137499581917, 369235213742, 990822728623, 2657069356996 ]
[ "nonn", "easy" ]
A214845
[ 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 0, 1, 3, 2, 1, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 3, 4, 1, 0, 1, 0, 0, 1, 1, 2, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 0, 0, 1, 0, 4, 3, 8, 1, 0, 0, 1, 0, 1, 1, 1, 0, 0, 0, 1, 0, 0, 3, 1, 2, 1, 0, 1, 0, 1, 1, 1, 5, 3, 4, 1 ]
[ "nonn", "tabf", "less" ]
A307129
[ 1, 29, 21, 49, 23, 27, 25, 45, 47, 43, 258, 12, 18, 14, 16, 34, 36, 38, 32, 58, 123, 87, 214, 56, 125, 85, 216, 54, 127, 83, 218, 52, 129, 81, 2929, 89, 212, 78, 1014, 76, 1016, 74, 1018, 72, 1218, 1812, 1238, 1814, 1216, 1816, 1214, 1818, 1212, 1838, 1232, 1858, 1234, 1836, 1236, 1834, 1256, 3814, 1258, 1832, 1418, 1612, 1438, 1614, 1416, 1616, 1414, 1618, 1412, 1638, 1432, 1658, 1434, 1636, 1436, 1634, 1456, 3614, 1458, 1632, 3418, 1652, 3438, 1654, 3416, 1656, 3414, 1676, 3616, 1454, 3618, 1452, 3638, 1852, 3218, 1854 ]
[ "base", "nonn" ]
A120074
[ 3, 13, 25, 70, 54, 203, 197, 340, 303, 825, 445, 1378, 892, 1221, 1565, 3128, 1545, 4389, 2427, 3592, 3688, 7843, 3589, 8420, 6191, 9097, 7135, 15834, 5774, 19375, 12493, 14814, 14147, 19647, 12264, 33078 ]
[ "nonn", "easy" ]
A318569
[ 2, 1, 4, 3, 2, 2, 6, 7, 62, 1, 62, 1, 4, 3, 10, 15, 10, 31, 2, 12, 2, 31, 26, 10, 6, 2, 116, 2, 8, 5, 18, 31, 254, 5, 78, 26, 18, 1, 24, 6, 18, 1, 70, 86, 11894, 13, 254, 5, 46, 3, 4, 1, 4, 58, 264, 1, 850, 4, 162, 4, 16, 9, 34, 63, 38, 127, 56, 3, 42, 39, 2 ]
[ "nonn", "look", "base" ]
A332590
[ 44, 104, 209, 90, 377, 86, 629, 285, 989, 104, 244, 1484, 322, 209, 2144, 365, 923, 144, 132, 207, 3002, 494, 4094, 1089, 5459, 363, 390, 924, 650, 7139, 7749, 714, 714, 531, 9179, 1287, 11627, 924, 6519, 1364, 1085, 755, 14534, 1517, 406, 2561, 17954, 21944, 3689 ]
[ "nonn" ]
A236887
[ 245, 975, 4129, 19005, 91617, 464737, 2442897, 13272897, 73869017, 419482609, 2416657937, 14082031833, 82711630513, 488789176177, 2900660394265, 17268508407633, 103027230851025, 615687930858265, 3683409663312753 ]
[ "nonn" ]
A323275
[ 1, 2, 2, 2, 2, 2, 2, 10, 7, 10, 3, 7, 5, 10, 7, 22, 6, 22, 5, 7, 8, 22, 10, 10, 8, 8, 10, 10, 6, 8, 22, 8, 22, 8, 9, 8, 10, 8, 8, 22, 10, 22, 22, 22, 22, 22, 8, 15, 22, 11, 15, 15, 22, 11, 16, 16, 22, 15, 10, 16, 15, 22, 15, 14, 22, 14, 17, 23, 40, 15, 22, 22, 40, 12, 22, 22, 16, 12, 18, 27, 18, 40, 40, 40, 22, 40, 40, 14, 18, 34 ]
[ "nonn", "base" ]
A284737
[ 1, 1, 8, 21, 3040, 20505, 10567748, 103372655 ]
[ "nonn", "more" ]
A037163
[ 1, 2, 2, 4, 6, 12, 20, 39, 71, 137, 261, 511, 995, 1974, 3915, 7841, 15749, 31835 ]
[ "dead" ]
A026557
[ 1, 3, 12, 28, 93, 201, 631, 1316, 4037, 8259, 25052, 50680, 152782, 306958, 921982, 1844304, 5526849, 11024331, 32987492, 65675764, 196323853, 390374193, 1166171943, 2316881892, 6918228187, 13737041045, 41007165500 ]
[ "nonn" ]
A053233
[ 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 24, 25, 26, 27, 28, 29, 30, 33, 34, 35, 36, 37, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 55, 56, 57, 58, 60, 61, 62, 63, 64, 65, 66, 69, 70, 71, 72, 73, 76, 77, 78, 79, 80, 81, 82, 83, 85 ]
[ "nonn", "changed" ]
A156438
[ 2, 0, 22, 7, 232, 270, 9312, 40416, 1578064, 10491480, 534495232, 4186295040, 266388662656, 2380048630848, 182963339479264, 1839487795001024, 166774503916789700, 1865501254974930000, 195842622547532780000 ]
[ "nonn" ]
A354486
[ 2, 3, 2, 7, 3, 3, 23, 5, 5, 3, 59, 11, 9, 5, 4, 314, 37, 23, 9, 7, 4, 1529, 83, 75, 17, 13, 7, 5, 8209, 274, 421, 41, 25, 13, 9, 5, 83313, 1217, 1103, 137, 61, 25, 17, 9, 6, 620297, 6161, 5047, 769, 187, 49, 33, 17, 11, 6 ]
[ "nonn", "tabl", "frac" ]
A006662
[ 14, 14, 36, 57, 155, 316, 902, 2053, 6059, 14810, 44842, 115009, 355293, 943860, 2963536, 8086913, 25733325, 71725012, 230811370, 654472364, 2126296860, 6115504594, 20032488714, 58309793101, 192375702851, 565712237384, 1878154216860, 5572017423973, 18602068872985, 55614936827124, 186590964861544, 561656499993915, 1892771576197125, 5731881027534278 ]
[ "nonn" ]
A072629
[ 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
[ "nonn" ]
A292037
[ 1, 2, 2, 6, 10, 16, 30, 46, 78, 124, 196, 306, 470, 724, 1086, 1644, 2438, 3608, 5304, 7734, 11232, 16196, 23270, 33206, 47250, 66846, 94232, 132280, 184966, 257720, 357768, 495090, 682702, 938760, 1286668, 1758708, 2397012, 3258340, 4417570, 5974204, 8059824 ]
[ "nonn" ]
A070243
[ 2, 5, 5, 9, 9, 13, 13, 18, 18, 20, 20, 26, 26, 26, 26, 32, 32, 36, 36, 41, 41, 43, 43, 53, 53, 53, 53, 55, 55, 57, 57, 64, 64, 64, 64, 72, 72, 72, 72, 81, 81, 85, 85, 88, 88, 90, 90, 101, 101, 101, 101, 103, 103, 105, 105, 108, 108, 110, 110, 119, 119, 119, 119, 127, 127 ]
[ "easy", "nonn" ]
A026691
[ 1, 1, 2, 4, 7, 13, 21, 36, 58, 106, 182, 333, 553, 964, 1583, 2842, 4851, 8752, 14662, 25624, 42578, 75838, 129440, 231437, 389828, 680953, 1140225, 2019932, 3451406, 6132335, 10371952, 18098034, 30472684, 53758827 ]
[ "nonn" ]
A140780
[ 1, 3, 29, 287, 2841, 28123, 278389, 2755767, 27279281, 270037043, 2673091149, 26460874447, 261935653321, 2592895658763, 25667020934309, 254077313684327, 2515106115908961, 24896983845405284, 246454732338143870, 2439650339536033300, 24150048663022190000 ]
[ "nonn" ]
A196567
[ 5, 8, 3, 1, 9, 8, 0, 8, 0, 7, 8, 2, 6, 5, 9, 2, 9, 7, 9, 0, 9, 4, 6, 8, 2, 6, 9, 3, 6, 3, 6, 3, 7, 4, 8, 8, 1, 7, 7, 0, 0, 6, 2, 5, 7, 3, 8, 7, 6, 5, 5, 6, 5, 4, 2, 0, 6, 3, 8, 0, 4, 0, 7, 5, 0, 0, 7, 0, 2, 5, 7, 2, 3, 1, 9, 6, 4, 1, 7, 4, 8, 6, 7, 3, 8, 6, 7, 5, 8, 2, 0, 7, 9, 8, 0, 0, 8, 7, 2, 4, 0, 0, 3, 0, 3, 7, 1, 1, 8, 9, 7, 6, 0, 4 ]
[ "nonn", "cons" ]
A225119
[ 8, 7, 4, 0, 1, 9, 1, 8, 4, 7, 6, 4, 0, 3, 9, 9, 3, 6, 8, 2, 1, 6, 1, 3, 1, 9, 6, 6, 3, 0, 3, 7, 3, 1, 3, 7, 8, 9, 4, 2, 5, 1, 6, 5, 0, 4, 7, 7, 2, 0, 7, 7, 2, 0, 9, 3, 8, 9, 4, 0, 5, 6, 7, 9, 3, 3, 5, 9, 6, 8, 6, 2, 3, 5, 6, 8, 0, 4, 7, 5, 0, 0, 7, 6, 7, 6, 5, 1, 7, 7, 6, 5, 3, 8, 0, 9, 6, 9, 7, 8 ]
[ "nonn", "cons", "easy" ]
A052442
[ 0, 1, 1, 3, 11, 56, 385, 3994, 67014, 1973029, 105731474, 10439496931, 1902968718515, 641662974453892, 401490336727861200, 467924684115578650000, 1.0197523900106505e+24, 4.171131179469163e+27, 3.213437804892179e+31, 4.677788941240379e+35 ]
[ "nonn" ]
A155238
[ 1, 4, 13, 28, 125, 568, 3422, 27373, 226848, 2490002, 34395449, 564841115, 11835714950, 297683710781, 9228089921657 ]
[ "nonn" ]
A323871
[ 1, 2, 8, 53, 216, 3112, 13512, 272844, 2362412, 40898808, 295024104, 14045779864, 81055130520, 3040383692328, 61408850927280, 1661142087743940, 15337737297545400, 1128511554416582900, 9768588138876674000, 803306338873264200000, 1.545234761876268e+22 ]
[ "nonn" ]
A003529
[ 1, 3, 5, 11, 15, 25, 31, 33, 41, 55, 75, 93, 123, 155, 165, 205, 275, 341, 451, 465, 615, 775, 825, 1023, 1025, 1271, 1353, 1705, 2255, 2325, 3075, 3813, 5115, 6355, 6765, 8525, 11275, 13981, 19065, 25575 ]
[ "nonn", "fini", "full", "easy" ]
A263123
[ 52446, 887805, 17782827, 344322375, 6946980030, 113558538589, 2022945129963, 36861501672007, 713132356848318, 12055652684915196 ]
[ "nonn" ]
A254035
[ 4800, 28800, 57600, 67200, 86400, 96000, 115200, 142800, 144000, 148800, 153600, 182400, 201600, 211200, 230400, 259200, 288000, 297600, 326400, 345600, 355200, 384000, 403200, 432000, 470400, 489600, 499200, 518400, 528000, 547200, 576000, 614400, 633600, 638400, 662400, 672000, 691200, 720000, 729600 ]
[ "nonn" ]
A059558
[ 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 92, 96, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144, 148, 152, 156, 160, 164, 168, 172, 176, 180, 184, 188, 192, 196, 200, 204, 208, 212, 216, 220, 224, 228 ]
[ "nonn", "easy" ]
A223272
[ 216, 6912, 765952, 63438848, 5889851392, 522106961920, 47175115472896, 4228713130491904, 380326363447427100, 34157975785279850000, 3.069635685131267e+21, 2.7578577914863232e+23 ]
[ "nonn" ]
A322798
[ 1, 1, 1, 1, 1, 1, 2, 3, 4, 5, 6, 7, 9, 12, 16, 22, 29, 37, 47, 60, 77, 101, 133, 174, 226, 292, 376, 486, 632, 823, 1072, 1394, 1808, 2342, 3036, 3939, 5116, 6648, 8636, 11211, 14548, 18875, 24493, 31795, 41283, 53604, 69594, 90338, 117251, 152184, 197540 ]
[ "nonn" ]
A211693
[ 80, 712, 6328, 56184, 498328, 4415576, 39087704, 345688344, 3054441560, 26964466456, 237834515800, 2095997626392, 18456488165848, 162389882849432, 1427675316724184, 12542069778534552, 110099840447243870 ]
[ "nonn" ]
A217458
[ 2, 1, 7, 4, 9, 0, 8, 7, 0, 5, 4, 3, 7, 7, 4, 5, 8, 3, 3, 4, 0, 9, 9, 2, 0, 8, 2, 6, 6, 0, 1, 1, 3, 9, 5, 2, 3, 3, 8, 5, 8, 8, 4, 0, 8, 8, 9, 7, 4, 1, 8, 4, 2, 6, 7, 5, 9, 7, 7, 6, 7, 1, 9, 8, 0, 3, 8, 8, 3, 5, 0, 6, 9, 8, 2, 6, 2, 0, 5, 4, 6, 1, 0, 2, 1, 2, 7, 5, 6, 1, 7, 6, 4, 7, 3, 7, 9, 0, 0, 8 ]
[ "nonn", "cons" ]
A168836
[ 1, 15, 210, 2940, 41160, 576240, 8067360, 112943040, 1581202560, 22136835840, 309915701760, 4338819824640, 60743477544960, 850408685629440, 11905721598812160, 166680102383370240, 2333521433367183400 ]
[ "nonn" ]
A262353
[ 8, 764, 76394, 7639321, 763932023, 76393202251, 7639320225003, 763932022500211, 76393202250021020, 7639320225002103000, 763932022500210200000, 7.639320225002102e+22, 7.639320225002103e+24, 7.639320225002102e+26, 7.639320225002103e+28 ]
[ "nonn", "base" ]
A081186
[ 1, 4, 17, 76, 353, 1684, 8177, 40156, 198593, 986404, 4912337, 24502636, 122336033, 611148724, 3054149297, 15265963516, 76315468673, 381534296644, 1907542343057, 9537324294796, 47685459212513, 238423809278164, 1192108586037617, 5960511549128476 ]
[ "nonn", "easy" ]
A154196
[ 2, 2, 6, 1, 8, 5, 9, 5, 0, 7, 1, 4, 2, 9, 1, 4, 8, 7, 4, 1, 9, 9, 0, 5, 4, 2, 2, 8, 6, 8, 5, 5, 2, 1, 7, 0, 8, 5, 9, 9, 1, 7, 1, 2, 8, 0, 2, 6, 3, 7, 6, 0, 8, 5, 5, 7, 4, 1, 3, 0, 9, 8, 8, 7, 6, 7, 7, 3, 7, 0, 4, 0, 2, 7, 6, 1, 8, 2, 9, 6, 1, 0, 1, 2, 2, 3, 4, 5, 3, 7, 7, 0, 9, 8, 9, 0, 3, 4, 9 ]
[ "nonn", "cons" ]
A216586
[ 1, 1, 5, 28, 202, 1579, 13375, 118858, 1098458, 10453452, 101872926, 1012109860, 10218226307, 104570617520, 1082633236498, 11321654913838, 119438468577559, 1269787015989428, 13592294300856138, 146390465351654180, 1585337895099162400, 17253991887494062000 ]
[ "nonn" ]
A005549
[ 1, 12, 54, 188, 636, 2168, 7556, 26826, 96724, 353390, 1305126, 4864450, 18272804, 69103526, 262871644, 1005137688, 3860909698, 14890903690, 57641869140, 223864731680, 872028568182, 3406103773674, 13337263822236 ]
[ "nonn", "walk", "more" ]
A230616
[ 0, 0, 0, 348, 7072, 149664, 3023532, 61203362, 1237807846, 25032128092, 506216068952, 10237045859808, 207020237832924, 4186499352406046, 84662140166304160, 1712093427814659300, 34623078306219536000 ]
[ "nonn" ]
A150229
[ 1, 2, 6, 22, 80, 310, 1252, 5148, 21482, 91276, 392896, 1701500, 7442013, 32815590, 145380566, 647569948, 2900243037, 13040713888, 58828778368, 266395866595, 1210193354780, 5510852683899, 25161291048035, 115172327913152, 528225223735864, 2427259219164773, 11175758755982136, 51542960940788260 ]
[ "nonn", "walk" ]
A164603
[ 1, 18, 76, 376, 1808, 8736, 42176, 203648, 983296, 4747776, 22924288, 110688256, 534450176, 2580553728, 12460015616, 60162277376, 290489171968, 1402605797376, 6772379877376, 32699942699008, 157889290305536 ]
[ "nonn", "easy" ]
A288371
[ 2, 3, 5, 7, 11, 23, 37, 53, 71, 113, 137, 163, 191, 757, 2161, 2801, 51521, 1418561, 4093601, 42456961, 69509441, 105616001, 2420046721, 9160905601, 1270453824641, 2326680294401, 190787784140801, 509498986796801, 2805949277824001, 612940220628736000 ]
[ "nonn" ]
A034930
[ 1, 1, 1, 1, 2, 1, 1, 3, 3, 1, 1, 4, 6, 4, 1, 1, 5, 2, 2, 5, 1, 1, 6, 7, 4, 7, 6, 1, 1, 7, 5, 3, 3, 5, 7, 1, 1, 0, 4, 0, 6, 0, 4, 0, 1, 1, 1, 4, 4, 6, 6, 4, 4, 1, 1, 1, 2, 5, 0, 2, 4, 2, 0, 5, 2, 1, 1, 3, 7, 5, 2, 6, 6, 2, 5, 7, 3, 1, 1, 4, 2, 4, 7, 0, 4, 0, 7, 4, 2, 4, 1, 1, 5, 6, 6, 3, 7, 4, 4, 7, 3, 6, 6, 5, 1 ]
[ "nonn", "tabl" ]
A335351
[ 8, 48, 64, 160, 208, 336, 392, 576, 664, 880, 936, 1248, 1376, 1632, 1784, 2176, 2344, 2736, 2872, 3304, 3568, 4048, 4224, 4768, 5048, 5616, 5776, 6496, 6744, 7440, 7736, 8392, 8776, 9496, 9712, 10656, 11024, 11808, 12088, 13120, 13464, 14448, 14800, 15736 ]
[ "nonn" ]
A153422
[ 13, 29, 47, 67, 89, 113, 139, 167, 197, 229, 263, 337, 419, 463, 509, 557, 607, 659, 769, 827, 887, 1013, 1217, 1289, 1439, 1597, 2027, 2213, 2309, 2609, 2713, 2819, 2927, 3037, 3617, 3739, 3863, 3989, 4513, 4649, 4787, 5507, 5657, 6277, 6599, 6763, 7789 ]
[ "nonn", "easy" ]
A299253
[ 1, 3, 4, 6, 8, 12, 16, 24, 32, 48, 64, 96, 126, 183, 242, 357, 472, 696, 920, 1356, 1792, 2640, 3486, 5136, 6788, 10002, 13216, 19473, 25730, 37911, 50092, 73806, 97518, 143688, 189860, 279744, 369628, 544620, 719612, 1060296, 1400980, 2064243, 2727504, 4018785, 5310068, 7824000, 10337932, 15232200, 20126468 ]
[ "nonn", "easy" ]
A067423
[ 1, 10, 240, 5760, 138240, 3317760, 79626240, 1911029760, 45864714240, 1100753141760, 26418075402240, 634033809653760, 15216811431690240, 365203474360565760, 8764883384653578000, 210357201231685880000 ]
[ "nonn", "easy" ]
A312585
[ 1, 4, 8, 14, 19, 21, 28, 34, 37, 42, 45, 50, 56, 60, 62, 69, 75, 78, 84, 86, 92, 98, 101, 103, 111, 117, 118, 125, 127, 134, 140, 142, 144, 153, 159, 159, 167, 167, 175, 182, 183, 185, 195, 201, 200, 209, 208, 217, 223, 223 ]
[ "nonn" ]
A249056
[ 1, 1, 15, 35, 3780, 9504, 2702700, 7001280, 3809332800, 10027987200, 8896257216000, 23655956688000, 31072794873120000, 83196255098880000, 151687572109032950000, 408177466766125040000, 9.86280987631626e+23, 2.6641189971790746e+24 ]
[ "nonn", "easy" ]
A007543
[ 2, 8, 12, 8, 16, 24, 20, 32, 18, 24, 40, 48, 28, 48, 60, 32, 32, 56, 72, 80, 36, 64, 84, 96, 50, 40, 72, 96, 112, 120, 44, 80, 108, 128, 140, 72, 48, 88, 120, 144, 160, 168, 52, 96, 132, 160, 180, 192, 98, 56, 104, 144, 176, 200, 216, 224, 60 ]
[ "nonn" ]
A359007
[ 0, 0, 0, 0, 1, 0, 2, 0, 2, 0, 0, 2, 0, 5, 1, 0, 0, 0, 2, 4, 0, 5, 0, 6, 0, 3, 0, 0, 2, 5, 0, 4, 14, 6, 3, 0, 6, 15, 5, 3, 9, 0, 5, 3, 0, 6, 5, 0, 3, 8, 3, 6, 0, 3, 2, 0, 0, 5, 9, 0, 4, 1, 0, 0, 3, 32, 0, 4, 11, 0, 7, 17, 0, 3, 11, 0, 2, 31, 6, 31, 0, 0, 6, 3, 0, 9, 2, 33, 3, 0, 3, 15, 0, 5 ]
[ "nonn", "easy" ]
A045134
[ 3, 7, 12, 13, 19, 23, 28, 29, 48, 49, 52, 53, 67, 71, 76, 77, 83, 87, 92, 93, 112, 113, 116, 117, 192, 193, 196, 197, 208, 209, 212, 213, 259, 263, 268, 269, 275, 279, 284, 285, 304, 305, 308, 309, 323, 327, 332, 333, 339, 343, 348 ]
[ "nonn", "base" ]
A348343
[ 336, 1792, 5376, 6096, 21504, 32004, 97536, 34062336, 64512000, 118008576, 30064771072 ]
[ "nonn", "more" ]
A145696
[ 7, 4137, 2440823, 1440081433, 849645604647, 501289466660297, 295759935683970560, 174497860764075980000, 1.0295344209086915e+23, 6.074235633575203e+25, 3.583788728465161e+28, 2.1144292755588112e+31 ]
[ "easy", "nonn" ]
A317783
[ 1, 1, 1, 3, 7, 13, 23, 41, 75, 139, 257, 473, 869, 1597, 2937, 5403, 9939, 18281, 33623, 61841, 113743, 209207, 384793, 707745, 1301745, 2394281, 4403769, 8099795, 14897847, 27401413, 50399055, 92698313, 170498779, 313596147, 576793241, 1060888169, 1951277557 ]
[ "nonn", "easy" ]
A362534
[ 1, 1, 6, 6, 15, 15, 140, 140, 315, 315, 1386, 1386, 3003, 3003, 51480, 51480, 109395, 109395, 92378, 92378, 969969, 969969, 2704156, 2704156, 16900975, 16900975, 70204050, 70204050, 145422675, 145422675, 4808643120, 4808643120, 9917826435, 9917826435, 40838108850, 40838108850 ]
[ "nonn", "frac" ]
A285064
[ 1, 5, 41, 429, 5329, 75989, 1215481, 21453693, 412820385, 8579772325, 191166679497, 4538638641997, 114238219541617, 3035305413035125, 84819458105387420, 2484842038066995700, 76101249873390600000, 2.4304978132601054e+21, 8.076953643310294e+22, 2.787318255464815e+24 ]
[ "nonn", "easy" ]
A387844
[ 1, 1, 1, 7, 57, 254, 859, 3004, 12393, 53143, 215766, 843756, 3321891, 13333932, 53774932, 215492564, 859595529, 3431847189, 13733091643, 54986385093, 219993856006, 879683351911, 3517929664756, 14072420067757, 56296324109907, 225191238869774, 900729032983924 ]
[ "nonn", "easy" ]
A045322
[ 2, 3, 7, 11, 13, 17, 23, 31, 37, 41, 53, 59, 67, 73, 79, 83, 97, 101, 107, 109, 137, 139, 149, 151, 157, 163, 167, 179, 181, 191, 193, 199, 223, 227, 233, 241, 251, 263, 269, 277, 283, 293, 307, 311, 317, 331, 347 ]
[ "nonn", "easy" ]
A036212
[ 11, 13, 12, 13, 9, 11, 11, 11, 11, 11, 10, 12, 11, 12, 8, 10, 10, 10, 10, 10, 7, 11, 1, 10, 7, 7, 7, 7, 7, 7, 9, 12, 10, 11, 7, 9, 9, 9, 9, 9, 10, 8, 7, 7, 8, 9, 10, 10, 10, 10, 11, 10, 7, 9, 9, 8, 10, 11, 11, 11, 13, 10, 7, 9, 10, 10, 8, 11, 13, 13, 14, 10, 7, 9, 10, 11, 11, 8, 13, 14 ]
[ "base", "nonn" ]
A162607
[ 0, 1, 1, 3, 10, 25, 51, 91, 148, 225, 325, 451, 606, 793, 1015, 1275, 1576, 1921, 2313, 2755, 3250, 3801, 4411, 5083, 5820, 6625, 7501, 8451, 9478, 10585, 11775, 13051, 14416, 15873, 17425, 19075, 20826, 22681, 24643, 26715, 28900, 31201, 33621 ]
[ "nonn", "easy" ]
A225496
[ 1, 2, 3, 4, 6, 7, 8, 9, 11, 12, 13, 14, 16, 17, 18, 19, 21, 22, 23, 24, 26, 27, 28, 29, 31, 32, 33, 34, 36, 37, 38, 39, 41, 42, 43, 44, 46, 47, 48, 49, 51, 52, 54, 56, 57, 58, 59, 61, 62, 63, 64, 66, 67, 68, 69, 71, 72, 73, 74, 76, 77, 78, 79, 81, 82, 83, 84 ]
[ "nonn" ]
A041264
[ 12, 289, 6948, 167041, 4015932, 96549409, 2321201748, 55805391361, 1341650594412, 32255419657249, 775471722368388, 18643576756498560, 448221313878333800, 10775955109836511000, 259071143949954600000, 6.228483409908747e+21, 1.4974267298175988e+23 ]
[ "nonn", "cofr", "frac", "easy" ]
A026319
[ 7, 10, 13, 16, 29, 32, 35, 38, 51, 54, 57, 60, 73, 76, 79, 82, 95, 98, 101, 104, 117, 120, 123, 126, 139, 142, 145, 148, 161, 164, 167, 170, 186, 189, 192, 208, 211, 214, 230, 233, 236, 252, 255, 258, 274, 277, 280, 296, 299, 302 ]
[ "nonn" ]
A265529
[ 0, 1, 2, 2, 4, 4, 4, 4, 8, 8, 10, 10, 10, 13, 13, 13, 16, 16, 16, 16, 20, 20, 20, 23, 23, 23, 26, 26, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 52, 52, 52, 52, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 80, 80 ]
[ "nonn", "base" ]
A302509
[ 1, 3, 11, 28, 90, 458, 4558, 82857, 1748514, 44378638, 1537387012, 96444437992, 9693542232011, 1237134041433890, 196120841811367260, 47516901892945490000, 1.9045444458145286e+22 ]
[ "nonn" ]
A140505
[ 2, -1, 4, 0, 12, 4, 44, 20, 172, 84, 684, 340, 2732, 1364, 10924, 5460, 43692, 21844, 174764, 87380, 699052, 349524, 2796204, 1398100, 11184812, 5592404, 44739244, 22369620, 178956972, 89478484, 715827884, 357913940, 2863311532, 1431655764, 11453246124 ]
[ "sign", "less" ]
A342379
[ 0, 0, 0, 0, 0, 5, 21, 63, 162, 381, 847, 1815, 3796, 7813, 15913, 32191, 64838, 130237, 261155, 523127, 1047224, 2095589, 4192509, 8386559, 16774890, 33551805, 67105911, 134214423, 268431772, 536866821, 1073737297, 2147478655, 4294961806, 8589928573, 17179862603 ]
[ "nonn", "easy" ]
A017453
[ 3125, 1048576, 14348907, 79235168, 282475249, 777600000, 1804229351, 3707398432, 6956883693, 12166529024, 20113571875, 31757969376, 48261724457, 71008211968, 101621504799, 141985700000, 194264244901 ]
[ "nonn", "easy" ]
A038792
[ 1, 1, 1, 1, 2, 1, 1, 3, 3, 1, 1, 4, 5, 4, 1, 1, 5, 8, 8, 5, 1, 1, 6, 12, 13, 12, 6, 1, 1, 7, 17, 21, 21, 17, 7, 1, 1, 8, 23, 33, 34, 33, 23, 8, 1, 1, 9, 30, 50, 55, 55, 50, 30, 9, 1, 1, 10, 38, 73, 88, 89, 88, 73, 38, 10, 1, 1, 11, 47, 103, 138, 144, 144, 138, 103, 47, 11, 1 ]
[ "nonn", "tabl", "easy" ]
A289405
[ 1, 10, 110, 1100, 11100, 111000, 1111000, 11110000, 111110000, 1111100000, 11111100000, 111111000000, 1111111000000, 11111110000000, 111111110000000, 1111111100000000, 11111111100000000, 111111111000000000, 1111111111000000000, 11111111110000000000 ]
[ "nonn", "easy" ]
A364069
[ 1, 2, 67, 4355, 295234, 21036803, 1625419909, 140823067772, 13947448935109, 1570142163116087, 196457384808738400, 26717651072732512000, 3.896182904620309e+21, 6.058037571391461e+23, 1.0023634840024376e+26, 1.7619174544126256e+28, 3.2807922425009333e+30 ]
[ "nonn" ]
A377603
[ 7, 8, 8, 9, 4, 7, 7, 3, 9, 9, 9, 7, 5, 3, 9, 0, 2, 0, 6, 4, 5, 1, 0, 1, 4, 2, 7, 0, 4, 4, 2, 8, 0, 6, 1, 8, 4, 7, 3, 8, 7, 0, 7, 9, 8, 2, 9, 4, 7, 9, 0, 9, 9, 7, 6, 7, 8, 6, 2, 9, 8, 3, 3, 4, 0, 2, 3, 3, 7, 9, 1, 8, 2, 3, 0, 1, 2, 0, 0, 5, 6, 2, 7, 0, 7, 1, 2, 6, 9, 9 ]
[ "nonn", "cons", "easy" ]
A139596
[ 0, 6, 14, 28, 44, 66, 90, 120, 152, 190, 230, 276, 324, 378, 434, 496, 560, 630, 702, 780, 860, 946, 1034, 1128, 1224, 1326, 1430, 1540, 1652, 1770, 1890, 2016, 2144, 2278, 2414, 2556, 2700, 2850, 3002, 3160, 3320, 3486, 3654, 3828 ]
[ "easy", "nonn" ]
A080185
[ 7, 29, 59, 149, 179, 239, 269, 599, 809, 1619, 2999, 4049, 4799, 8999, 9719, 15359, 21599, 23039, 33749, 138239, 179999, 281249, 345599, 737279, 3455999, 6143999, 6560999, 10124999, 13668749, 15551999, 17495999, 20995199, 22118399, 23999999 ]
[ "nonn" ]
A081314
[ 24, 12, 48, 20, 8, 12, 16, 4, 120, 4, 24, 12, 24, 4, 6, 2, 8, 2, 4, 6, 4, 2, 2, 20 ]
[ "nonn", "hard", "more" ]
A002482
[ 1, 0, 0, 2664, 101142, 1645056, 16045056, 110146176, 584713404, 2549741568, 9515943936, 31314087864, 92917622376, 252775586304, 638328674304, 1511740886400, 3387163161366, 7228598851584 ]
[ "nonn" ]
A243848
[ 1, 1, 1, 1, 3, 1, 3, 2, 1, 3, 2, 5, 5, 1, 3, 2, 5, 5, 3, 4, 3, 1, 3, 2, 5, 5, 3, 4, 7, 11, 5, 11, 7, 1, 3, 2, 5, 5, 3, 4, 7, 11, 5, 11, 7, 7, 7, 6, 8, 7, 7, 4, 1, 3, 2, 5, 5, 3, 4, 7, 11, 5, 11, 7, 7, 7, 6, 8, 7, 9, 17, 4, 9, 21, 17, 11, 5, 17, 21, 9, 17, 9 ]
[ "nonn", "easy", "tabf", "frac" ]
A257049
[ 6, 66, 6810, 72006, 182430, 370614, 3203694, 6353634, 28698786, 33163770, 55637466, 105470250, 151375626, 178631034, 185921166, 217064574, 376267326, 853918566, 1172755854, 1443472134, 1472632266, 2217439890, 6709586934, 13826592870, 17356640970, 18127936590 ]
[ "nonn" ]
A276352
[ 0, 90, 9900, 999000, 99990000, 9999900000, 999999000000, 99999990000000, 9999999900000000, 999999999000000000, 99999999990000000000, 9.9999999999e+21, 9.99999999999e+23, 9.999999999999e+25, 9.9999999999999e+27, 9.99999999999999e+29 ]
[ "nonn", "easy" ]
A260711
[ 0, 8, 16, 32, 48, 64, 96, 128, 160, 192, 224, 256, 320, 384, 448, 512, 576, 640, 704, 768, 832, 896, 960, 1024, 1152, 1280, 1408, 1536, 1664, 1792, 1920, 2048, 2176, 2304, 2432, 2560, 2688, 2816, 2944, 3072, 3200, 3328, 3456, 3584, 3712, 3840, 3968, 4096, 4352, 4608, 4864 ]
[ "nonn" ]
A338930
[ 8, 16, 18, 21, 39, 45, 55, 57, 93, 98, 99, 100, 111, 119, 129, 144, 153, 162, 183, 203, 205, 219, 231, 237, 245, 261, 273, 291, 309, 341, 355, 377, 381, 413, 417, 429, 471, 481, 484, 489, 505, 511, 513, 517, 543, 583, 603, 609, 629, 637, 639, 651, 655, 669, 676, 687, 689, 697, 707, 722, 723, 731 ]
[ "nonn" ]
A050226
[ 1, 4, 5, 15, 42, 44, 47, 121, 336, 340, 347, 930, 2548, 6937, 6947, 51322, 379097, 379131, 379133, 2801205, 20698345, 56264090, 56264197, 152941920, 152942012, 8350344420, 61701166395, 455913379395, 455913379831, 1239301050694, 3368769533660, 3368769533812 ]
[ "nonn", "nice" ]
A125247
[ 22, 130, 184, 1012, 2272, 18904, 33664, 70564, 85936, 100804, 391612, 527872, 1090912, 17619844, 2147713024, 6800695312, 34360655872, 549759483904, 1661355408388, 28502765343364, 82994670582016, 99249696661504, 120646991405056, 431202442356004, 952413274955776 ]
[ "easy", "nonn" ]
A248020
[ 21, 35, 39, 50, 55, 57, 63, 65, 75, 77, 85, 93, 98, 111, 115, 119, 129, 133, 143, 155, 161, 171, 175, 183, 185, 187, 189, 201, 203, 205, 209, 215, 217, 219, 221, 235, 237, 242, 245, 247, 253, 259, 265, 275, 279, 291, 299, 301, 305, 309, 319, 323, 325, 327, 329, 333, 335, 338, 341 ]
[ "nonn", "easy" ]
A125336
[ 1, 26, 170, 878, 5314, 32546, 204290, 1299114, 8349954, 54102794, 352836290, 2313260426, 15233145250, 100686576250, 667632373298, 4439154062018, 29587484525314, 197622056861834, 1322444776094468, 8864330906128944 ]
[ "nonn", "base" ]
A316919
[ 1, 5, 13, 137, 6339, 533726, 493774680, 1580858618327, 13171868574537480 ]
[ "nonn" ]
A354673
[ 0, 1, 2, 4, 6, 10, 13, 18, 22, 28, 34, 42, 49, 58, 66, 76, 86, 98, 109, 122, 134, 148, 162, 178, 193, 210, 226, 244, 262, 282, 301, 322, 342, 364, 386, 410, 433, 458, 482, 508, 534, 562, 589, 618, 646, 676, 706, 738, 769, 802, 834, 868, 902, 938, 973, 1010, 1046 ]
[ "nonn", "easy" ]
A240504
[ 1, 3, 3, 7, 1, 3, 11, 11, 1, 3, 11, 23, 51, 43, 43, 87, 23, 47, 15, 95, 215, 431, 47, 47, 295, 423, 391, 783, 143, 287, 1311, 1887, 847, 719, 719, 1439, 3471, 2511, 975, 1951, 7583, 15167, 14655, 12607, 4383, 8767, 575, 575, 16959, 25407, 24895, 49791, 639, 10879 ]
[ "nonn", "base" ]
A390405
[ 1, 5, 487, 284490, 138804750010, 3.6614447980107264e+22, 1.4886874021582775e+45, 6.8517554105664095e+90 ]
[ "nonn", "new" ]
A116965
[ 2, 3, 4, 5, 6, 9, 10, 11, 16, 17, 18, 23, 30, 49, 50, 51, 56, 63, 96, 106, 107, 108, 113, 120, 153, 210, 385, 386, 387, 392, 399, 432, 489, 768, 946, 947, 948, 953, 960, 993, 1050, 1329, 1890, 3841, 3842, 3843, 3848, 3855, 3888, 3945, 4224, 4785, 7680, 10396 ]
[ "easy", "nonn" ]
A357741
[ 4, 6, 9, 21, 33, 129, 159, 3066835, 3067195, 3067255, 3067615, 3067745, 3068045, 44690978227, 44690978647, 44690978983, 44690979529 ]
[ "nonn", "hard", "more" ]
A347476
[ 4, 5, 8, 10, 12, 13, 18, 20, 24, 26, 28, 29, 32, 34, 40, 44, 46, 50, 52, 56, 58, 60, 61, 66, 68, 74, 80, 84, 86, 90, 96, 98, 104, 108, 110, 114, 116, 120, 122, 124, 125, 128, 142, 146, 148, 152, 154, 158, 166, 172, 176, 182, 184, 188, 194, 196, 202, 208, 212 ]
[ "nonn", "base" ]
A171473
[ 35, 135, 527, 2079, 8255, 32895, 131327, 524799, 2098175, 8390655, 33558527, 134225919, 536887295, 2147516415, 8590000127, 34359869439, 137439215615, 549756338175, 2199024304127, 8796095119359, 35184376283135 ]
[ "nonn", "easy" ]
A209674
[ -1, 4, 9, 9, 5, 0, 4, 3, 10, 11, 5, 3, 2, 6, 1, 5, 8, 7, 9, 6, 10, 7, 8, 1, 7, 4, 3, 10, 6, 4, 10, 2, 1, 8, 5, 8, 7, 6, 4, 3, 6, 1, 4, 7, 4, 3, 6, 4, 3, 7, 1, 9, 11, 5, 8, 6, 4, 3, 7, 2, 5, 8, 7, 4, 6, 4, 3, 7, 2, 6, 4, 10, 5, 6, 4, 3, 7, 2, 6, 9, 11, 7, 6, 4, 3, 7, 2, 6, 9, 8, 12, 6, 4, 3, 7, 2, 6, 9, 8, 10 ]
[ "sign", "base" ]
A038797
[ 1, 6, 23, 73, 211, 581, 1560, 4135, 10890, 28590, 74946, 196326, 514123, 1346148, 3524441, 9227311, 24157645, 63245795, 165579930, 433494205, 1134902916, 2971214796, 7778741748, 20365010748, 53316290821, 139583862066, 365435295755, 956722025605, 2504730781495 ]
[ "nonn", "easy" ]
A075695
[ 1, 5, 17, 29, 45, 61, 81, 97, 109, 145, 157, 177, 185, 201, 245, 269, 285, 329, 345, 353, 381, 397, 421, 445, 469, 505, 537, 557, 581, 605, 621, 661, 693, 725, 741, 761, 785, 809, 833, 873, 889, 933, 949, 985, 1009, 1029, 1037, 1061, 1077, 1105, 1129, 1177 ]
[ "easy", "nonn" ]
A092539
[ 1, 3, 6, 13, 27, 55, 110, 220, 441, 883, 1766, 3532, 7064, 14129, 28258, 56517, 113035, 226070, 452140, 904281, 1808562, 3617124, 7234249, 14468499, 28936999, 57873998, 115747997, 231495994, 462991989, 925983979, 1851967959, 3703935918 ]
[ "easy", "nonn" ]
A027116
[ 7, 23, 56, 120, 241, 467, 886, 1660, 3087, 5715, 10552, 19452, 35825, 65943, 121342, 223240, 410663, 755391, 1389448, 2555664, 4700673, 8645963, 15902486, 29249316, 53797967, 98949979, 181997480, 334745652, 615693345 ]
[ "nonn" ]