id
stringlengths
7
11
seq
listlengths
1
347
keywords
listlengths
1
8
A151779
[ 1, 6, 6, 30, 6, 30, 30, 150, 6, 30, 30, 150, 30, 150, 150, 750, 6, 30, 30, 150, 30, 150, 150, 750, 30, 150, 150, 750, 150, 750, 750, 3750, 6, 30, 30, 150, 30, 150, 150, 750, 30, 150, 150, 750, 150, 750, 750, 3750, 30, ...
[ "nonn", "easy" ]
A290103
[ 1, 1, 2, 1, 3, 2, 4, 1, 2, 3, 5, 2, 6, 4, 6, 1, 7, 2, 8, 3, 4, 5, 9, 2, 3, 6, 2, 4, 10, 6, 11, 1, 10, 7, 12, 2, 12, 8, 6, 3, 13, 4, 14, 5, 6, 9, 15, 2, 4, 3, 14, 6, 16, 2, 15, 4, 8, 10, 17, 6, 18,...
[ "nonn" ]
A356916
[ 1, 3, 3, 1, 6, 15, 8, 12, 6, 1, 10, 45, 60, 75, 60, 80, 30, 30, 10, 1, 15, 105, 275, 420, 516, 625, 465, 540, 495, 276, 255, 80, 60, 15, 1, 21, 210, 910, 2100, 3192, 4767, 5355, 4830, 5845, 5061, 5397, 4725, 2730, 2625, ...
[ "nonn", "tabf" ]
A264696
[ 1, 2, 3, 22, 93, 790, 7202, 53884, 640932, 7175700, 150597632, 3323171712, 92150022336, 2899990063360, 72285872321536 ]
[ "nonn" ]
A148405
[ 1, 1, 2, 5, 17, 51, 198, 687, 2836, 10749, 46067, 184597, 812310, 3381735, 15171550, 64957583, 295681089, 1293489193, 5954355415, 26493181563, 123052625899, 555024101601, 2596786703611, 11844164816717, 55752005243735, 256658725835629, 1214315074819775, 563399830...
[ "nonn", "walk" ]
A094975
[ 1, 2, 5, 12, 29, 69, 161, 376, 878, 2050, 4783, 11162, 26044, 60771, 141799, 330865, 772020, 1801380, 4203220, 9807513, 22884198, 53396463, 124591747, 290714077, 678332846, 1582776641, 3693145496, 8617339492, 20107125483, 46916626127 ]
[ "easy", "nonn" ]
A234645
[ 1, 3, 13, 56, 84, 312, 256, 660, 800, 1332, 1344, 3458, 2240, 3792, 4836, 6572, 4356, 13440, 6160, 16800, 13312, 15192, 11136, 35685, 19840, 25284, 30976, 42560, 22740, 63648, 30464, 71820, 51792, 65664, 53952, 111440, 52136, 84480, 99008, ...
[ "nonn", "easy" ]
A281118
[ 1, 1, 1, 2, 1, 2, 1, 4, 2, 2, 1, 6, 1, 2, 2, 12, 1, 6, 1, 6, 2, 2, 1, 20, 2, 2, 4, 6, 1, 8, 1, 32, 2, 2, 2, 28, 1, 2, 2, 20, 1, 8, 1, 6, 6, 2, 1, 76, 2, 6, 2, 6, 1, 20, 2, 20, 2, 2, 1, 38, 1, 2,...
[ "nonn" ]
A253121
[ 18, 1730, 169498, 16609050, 1627517378, 159480093970, 15627421691658, 1531327845688490, 150054501455780350, 14703809814820784000, 1.4408233073509812e+21, 1.4118598031058133e+23, 1.383478524712962e+25, 1.355667768238392e+27 ]
[ "nonn", "easy" ]
A243927
[ 1, 2, 2, 3, 3, 5, 8, 11, 13, 19, 28, 42, 60, 88, 123, 176, 252, 371, 531, 768, 1091, 1581, 2256, 3262, 4685, 6818, 9755, 14167, 20321, 29465, 42275, 61280, 88082, 127736, 183613, 266012, 382840, 554373 ]
[ "nonn", "easy" ]
A227130
[ 0, 3, 5, 7, 8, 10, 13, 14, 16, 19, 20, 22, 25, 26, 28, 30, 33, 35, 36, 39, 41, 42, 45, 47, 49, 50, 52, 54, 57, 59, 60, 63, 65, 66, 69, 71, 73, 74, 76, 78, 81, 83, 84, 87, 89, 90, 93, 95, 97, 98, 100, 102, 105, ...
[ "nonn", "base" ]
A046799
[ 1, 1, 1, 1, 1, 2, 2, 2, 1, 2, 2, 2, 2, 2, 3, 3, 1, 2, 4, 2, 2, 3, 3, 2, 3, 4, 4, 3, 2, 3, 5, 2, 2, 4, 4, 5, 4, 3, 4, 3, 2, 3, 6, 2, 3, 5, 5, 3, 3, 3, 5, 5, 3, 3, 6, 5, 3, 4, 3, 4, 4, 2, 5, 5...
[ "nonn" ]
A348545
[ 9, 39, 49, 69, 99, 119, 129, 159, 169, 189, 219, 249, 259, 279, 289, 299, 309, 329, 339, 369, 399, 429, 459, 469, 489, 519, 529, 539, 549, 559, 579, 609, 629, 639, 669, 679, 689, 699, 729, 749, 759, 789, 799, 819, 849, 879, ...
[ "nonn", "base" ]
A253248
[ 1, 2, 3, 4, 4, 6, 6, 8, 8, 10, 8, 12, 10, 13, 14, 16, 13, 18, 14, 20, 19, 20, 17, 24, 20, 25, 24, 27, 19, 30, 23, 31, 29, 30, 30, 36, 25, 35, 34, 39, 30, 42, 31, 41, 41, 41, 34, 48, 38, 48, 44, 51, 36, 53, 46...
[ "nonn", "look" ]
A147939
[ 1, 2, 6, 24, 96, 376, 2214, 13736, 74156, 544746, 4407076, 31351588, 285115742, 2837535876, 24004174902, 263778523564 ]
[ "nonn" ]
A386165
[ 2, 7, 67, 227, 277, 677, 727, 787, 827, 877, 887, 2267, 2287, 2677, 2687, 2767, 2777, 2887, 6277, 6287, 6827, 7687, 7727, 7867, 7877, 8287, 8627, 8677, 8867, 8887, 22277, 22727, 22777, 22787, 22877, 26227, 26267, 26627, 26687, 26777, 27...
[ "nonn", "base", "easy" ]
A354159
[ 2, 13, 103, 239, 499, 1567, 3257, 6971, 14447, 30259, 63317, 130699 ]
[ "nonn", "more" ]
A283464
[ 1, 1, 1, 2, 1, 3, 1, 5, 3, 4, 1, 8, 1, 6, 5, 14, 1, 13, 1, 11, 7, 7, 1, 23, 5, 9, 17, 17, 1, 18, 1, 41, 9, 10, 7, 38, 1, 12, 11, 32, 1, 28, 1, 20, 23, 15, 1, 68, 7, 25, 13, 26, 1, 63, 11, 50, 15, 16, ...
[ "nonn" ]
A279141
[ 1, 0, 101, 0, 10101, 0, 1010101, 0, 101011101, 10100, 10101000001, 11100, 1010111010101, 101000000, 101010000010101, 111000000, 10101110101010100, 1010000000000, 1010100000111010000, 1110101000000, 101011101010000000000, 10100000111000000 ]
[ "nonn", "easy" ]
A007334
[ 1, 2, 8, 50, 432, 4802, 65536, 1062882, 20000000, 428717762, 10319560704, 275716983698, 8099130339328, 259492675781250, 9007199254740992, 336755653118801860, 13493281232954917000, 576882827135242340000, 2.62144e+22 ]
[ "nonn" ]
A025215
[ 1, 3, 6, 10, 16, 22, 28, 36, 44, 52, 61, 71, 81, 92, 103, 114, 126, 138, 151, 164, 177, 191, 205, 219, 233, 248, 263, 279, 295, 311, 327, 343, 360, 377, 394, 412, 429, 447, 465, 483, 502, 521, 540, 559, 578, 598, 617, 637,...
[ "nonn" ]
A124066
[ 1, 2, 3, 6, 19, 138, 5555, 5661606, 8017014805939, 5.4997818951506114e+23, 7.561900223558493e+46, 6.155050109303706e+86 ]
[ "easy", "nonn" ]
A267635
[ 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1...
[ "nonn", "tabf", "easy" ]
A349442
[ 1, 1, 2, -1, 4, 2, 6, -3, -2, 4, 10, -2, 12, 6, 8, -1, 16, -2, 18, -4, 12, 10, 22, -6, -4, 12, -16, -6, 28, 8, 30, 5, 20, 16, 24, 2, 36, 18, 24, -12, 40, 12, 42, -10, -8, 22, 46, -2, -6, -4, 32, -12, 52, -16, ...
[ "sign", "mult" ]
A059346
[ 1, 0, 1, 1, 1, 2, 1, 2, 3, 5, 3, 4, 6, 9, 14, 6, 9, 13, 19, 28, 42, 15, 21, 30, 43, 62, 90, 132, 36, 51, 72, 102, 145, 207, 297, 429, 91, 127, 178, 250, 352, 497, 704, 1001, 1430, 232, 323, 450, 628, 878, 1230, 172...
[ "nonn", "easy", "nice", "tabl" ]
A314576
[ 1, 5, 8, 9, 16, 19, 24, 29, 30, 37, 37, 46, 53, 46, 57, 62, 65, 69, 66, 79, 80, 83, 96, 89, 93, 102, 107, 112, 105, 116, 125, 123, 132, 133, 134, 139, 148, 155, 149, 152, 163, 168, 169, 172, 179, 179, 186, 195, 192, 19...
[ "nonn" ]
A231278
[ 2, 111, 212, 1011, 1101, 1121, 2012, 2122, 10121, 10211, 11001, 11201, 12011, 12121, 12211, 20012, 20102, 20122, 21002, 21022, 22102, 22122, 22212, 101001, 101021, 101111, 102101, 102121, 110021, 110111, 110221, 111121, 111211, 112001, 112201, 12...
[ "nonn", "base", "easy" ]
A374007
[ 16, 27, 31, 42, 50, 61, 73, 84, 100, 111, 131, 142, 166, 177, 205, 216, 248, 259, 295, 306, 346, 357, 401, 412, 460, 471, 523, 534, 590, 601, 661, 672, 736, 747, 815, 826, 898, 909, 985, 996, 1076, 1087, 1171, 1182, 1270, 1281...
[ "nonn", "easy" ]
A011780
[ 1, 6, 26, 92, 291, 850, 2348, 6216, 15925, 39742, 97086, 233012, 550983, 1286442, 2970960, 6796320, 15417945, 34719510, 77672290, 172743180, 382147691, 841346306, 1844250996, 4026531832, 8758949501, 18989322990, 41040798598, 88444511716, 190092071055, 407544...
[ "nonn", "easy" ]
A129470
[ 883, 1747, 2417, 2621, 3181, 3301, 3533, 3571, 3691, 3853, 4027, 4133, 4513, 4783, 4861, 4957, 5303, 5381, 5393, 5563, 5641, 5821, 6067, 6577, 6991, 7177, 7253, 7331, 8059, 8093, 8377, 8731, 8839, 8929, 8969, 9221, 9281, 9397, 9613, 9931 ...
[ "easy", "nonn" ]
A255686
[ 3, 9, 12, 15, 18, 21, 27, 33, 39, 45, 51, 63, 69, 87, 93, 111, 123, 135, 141, 153, 159, 177, 189, 201, 219, 225, 237, 249, 255, 267, 291, 303, 309, 321, 339, 363, 381, 393, 411, 423, 453, 459, 501, 537, 543, 573, 579, 633,...
[ "nonn" ]
A342682
[ 1, 0, 1, -1, 1, 1, 0, -1, 0, -1, 2, 0, 1, 1, -1, 0, -1, 1, -1, -2, 1, 0, 2, -1, 1, -1, 2, 1, 0, 0, -1, 1, -1, -1, 0, 1, 0, 2, -3, -1, -1, 0, 1, -2, 2, 1, 1, -1, 0, 1, 0, -2, 1, -1, 3, 0, 1, 0, 0, 1,...
[ "sign" ]
A185800
[ 704, 13440, 260544, 5177344, 104024384, 2091689856, 42093682560, 847003638592, 17044363936064, 342984883288320, 6901954012961472, 138889149973883970, 2794890082844179500, 56242044597486800000, 1.1317682557821329e+21 ]
[ "nonn" ]
A330769
[ 1, 6, 105, 5005, 323323, 30808063, 3212440751, 435656388001, 63836474265323, 12091972151626184, 2500935283708076000, 497341164867050860000, 1.1851158660880338e+23, 3.137994632449856e+25, 8.435082644934113e+27, 2.4161607659919413e+30, 8.55269503485275e+32 ]
[ "nonn" ]
A181222
[ 44, 1936, 34020, 845531, 21513936, 507962194, 12297765846, 298705742479, 7214603356059, 174532135006271, 4223718879095262, 102172834596986900, 2471821868183143000, 59801751244062860000, 1.4467645897802066e+21 ]
[ "nonn" ]
A319294
[ 1, 0, 144, -5120, 70524, -626688, 4265600, -24164352, 119375370, -529539072, 2151757440, -8125793280, 28827864296, -96885780480, 310514729472, -954123868160, 2823202073655, -8074060259328, 22387521828480, -60344692402176, 158484892943628, -406368240128000, 101904937417497...
[ "sign" ]
A176557
[ 7, 23, 43, 67, 127, 163, 347, 463, 743, 823, 907, 1087, 1283, 1607, 1723, 2503, 2647, 3767, 3943, 5923, 6143, 6367, 6827, 7547, 8563, 9643, 9923, 11083, 11383, 13267, 14947, 15647, 16363, 17467, 18223, 19387, 20183, 21407, 24847, 25747, ...
[ "nonn" ]
A266965
[ 17, 29, 37, 41, 53, 73, 89, 97, 101, 109, 113, 137, 149, 157, 173, 193, 197, 229, 233, 241, 257, 269, 277, 281, 293, 313, 317, 337, 349, 353, 373, 389, 397, 401, 409, 433, 449, 457, 461, 509, 521, 541, 557, 569, 577, 593, 60...
[ "nonn" ]
A105665
[ 1, 5, 4, 7, 17, 6, 9, 55, 10, 12, 2485, 14, 14, 102, 20, 17, 62, 27, 19, 49, 39, 23, 44, 56, 25, 40, 93, 30, 39, 194, 33, 38, 2486, 41, 39, 282, 48, 39, 146, 60, 42, 106, 77, 44, 85, 107, 48, 75, 163, 51, 68, 320, ...
[ "nonn" ]
A162649
[ 1, 1, 1, 4, 37, 276, 2221, 26888, 397097, 6055696, 103023481, 2047621632, 44856857101, 1051415079872, 26792169643877, 743266588537216, 22085066412427730, 698048232173484300, 23495515539312270000 ]
[ "nonn" ]
A334463
[ 1, 2, 3, 4, 10, 6, 14, 8, 18, 10, 22, 24, 26, 14, 45, 16, 34, 36, 38, 20, 63, 44, 46, 48, 50, 52, 81, 28, 58, 90, 62, 32, 99, 68, 105, 72, 74, 76, 117, 80, 82, 126, 86, 44, 180, 92, 94, 96, 98, 150, 204, 52, 106,...
[ "nonn" ]
A232688
[ 1, 1, 6, 24, 160, 1100, 9168, 84336, 868544, 9806688, 120754080, 1608251040, 23036978688, 353070167424, 5764504370688, 99875064159360, 1830107743518720, 35360088597841920, 718450398365755400, 15313427783968370000, 341652563064038000000, 7.962756873168408e+21 ]
[ "nonn" ]
A193691
[ 1, 1, 1, 2, 1, 2, 2, 4, 5, 1, 2, 2, 4, 5, 2, 4, 4, 8, 10, 5, 10, 13, 14, 1, 2, 2, 4, 5, 2, 4, 4, 8, 10, 5, 10, 13, 14, 2, 4, 4, 8, 10, 4, 8, 8, 16, 20, 10, 20, 26, 28, 5, 10, 10, 20, 25, 13, 26, 34, ...
[ "nonn", "look", "tabf" ]
A228351
[ 1, 2, 1, 1, 3, 1, 2, 2, 1, 1, 1, 1, 4, 1, 3, 2, 2, 1, 1, 2, 3, 1, 1, 2, 1, 2, 1, 1, 1, 1, 1, 1, 5, 1, 4, 2, 3, 1, 1, 3, 3, 2, 1, 2, 2, 2, 1, 2, 1, 1, 1, 2, 4, 1, 1, 3, 1, 2, 2, 1, 1, 1, 2, 1...
[ "nonn", "tabf" ]
A181254
[ 126, 746, 3190, 10818, 41374, 133850, 386406, 1297322, 3873790, 10724850 ]
[ "nonn" ]
A042251
[ 1, 1, 2, 33, 35, 68, 3435, 3503, 6938, 114511, 121449, 235960, 11919449, 12155409, 24074858, 397353137, 421427995, 818781132, 41360484595, 42179265727, 83539750322, 1378815270879, 1462355021201, 2841170292080, 143520869625201, 146362039917281 ]
[ "nonn", "frac", "easy" ]
A135000
[ 7, 9, 7, 5, 7, 2, 3, 7, 5, 8, 1, 5, 9, 9, 5, 3, 7, 1, 2, 0, 9, 1, 3, 6, 3, 9, 3, 6, 3, 8, 2, 2, 2, 8, 0, 3, 8, 8, 3, 4, 6, 8, 9, 1, 2, 5, 6, 4, 6, 1, 6, 6, 9, 8, 2, 3, 6, 6, 1, 2, 8, 2, 5, 4...
[ "cons", "nonn" ]
A090020
[ 0, 1, 13, 91, 529, 2851, 14833, 75811, 383809, 1932931, 9705553, 48648931, 243605089, 1219100611, 6098716273, 30503196451, 152544778369, 762810181891, 3814309582993, 19072323542371, 95363943807649, 476826695752771, 2384154405761713, 11920834803510692, 5960436232907693...
[ "easy", "nonn" ]
A221785
[ 0, 21, 142, 1325, 13682, 109702, 1104476, 9561346, 89663745 ]
[ "nonn" ]
A026080
[ 1, 2, 4, 7, 22, 64, 191, 567, 1689, 5033, 15013, 44809, 133816, 399802, 1194949, 3572693, 10684758, 31962456, 95633229, 286193409, 856610214, 2564317356, 7677475521, 22988860305, 68843627049, 206183053485, 617563017927, 1849887488987 ]
[ "nonn" ]
A098045
[ 1, 13, 14, 19, 13, 14, 16, 71, 34, 35, 74, 94, 13, 13, 127, 94, 79, 106, 76, 74, 140, 14, 172, 118, 32, 73, 134, 71, 173, 395, 71, 14, 185, 115, 182, 97, 118, 13, 137, 104, 310, 31, 923, 701, 163, 152, 79, 115, 94, 17,...
[ "base", "easy", "nonn", "less" ]
A094061
[ 1, 0, 8, 24, 216, 1200, 8840, 58800, 423640, 3000480, 21824208, 158964960, 1171230984, 8668531872, 64574844048, 483114856224, 3630440899800, 27379154692032, 207172490054816, 1572194644061184, 11962847247681616, 91242602561647680, 697438669619791000 ]
[ "nonn", "easy" ]
A317377
[ 1, 4, 18, 123, 2089, 75405, 4726521, 569899203, 132364711390, 58207830722829, 48518983884550650, 77042834793060610000 ]
[ "nonn" ]
A136933
[ 0, 88, 878, 880, 8780, 8800, 87800, 88000, 878000, 880000, 8387078, 8780000, 8800000, 83870780, 87800000, 88000000, 838707800, 878000000, 880000000, 8387078000, 8780000000, 8800000000, 8833878448, 83870780000, 87774340088, 87800000000, 88000000000, 88004400088, ...
[ "base", "nonn" ]
A082570
[ 1, 4, 13, 53, 266, 1597, 11180, 89441, 804970, 8049701, 88546712, 1062560545, 13813287086, 193386019205, 2900790288076, 46412644609217, 789014958356690, 14202269250420420, 269843115757988000, 5396862315159760000, 113334108618354970000, 2.4933503896038094e+21 ]
[ "nonn" ]
A234187
[ 33720, 549448, 9120608, 153306026, 2571461348, 43400523142, 730012705548, 12351551016378, 208225886140004, 3531762344820950, 59673341526538620, 1014709076188331800, 17184235472239702000, 292979555763785920000 ]
[ "nonn" ]
A173786
[ 2, 3, 4, 5, 6, 8, 9, 10, 12, 16, 17, 18, 20, 24, 32, 33, 34, 36, 40, 48, 64, 65, 66, 68, 72, 80, 96, 128, 129, 130, 132, 136, 144, 160, 192, 256, 257, 258, 260, 264, 272, 288, 320, 384, 512, 513, 514, 516, 520, 528, ...
[ "nonn", "tabl", "easy" ]
A113841
[ 1, 3, 7, 71, 199, 455, 4551, 12743, 29127, 291271, 815559, 1864135, 18641351, 52195783, 119304647, 1193046471, 3340530119, 7635497415, 76354974151, 213793927623, 488671834567, 4886718345671, 13682811367879, 31274997412295 ]
[ "nonn", "easy" ]
A085933
[ 1, 2, 3, 4, 242, 292, 484, 676, 18581, 20402, 20902, 40804, 60706, 81518, 1085801, 1805081, 2004002, 2009002, 4008004, 6007006, 8015108, 8105018, 100858001, 108050801, 180050081, 200040002, 200090002, 400080004, 600070006, 800151008, 801050108, 810050018...
[ "nonn", "base", "easy" ]
A219093
[ 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 3, 1, 1, 3, 1, 1, 2, 1, 4, 3, 1, 1, 3, 1, 1, 1, 4, 1, 5, 1, 1, 1, 1, 5, 3, 1, 1, 1, 4, 1, 6, 1, 1, 3, 1, 1, 3, 1, 1, 1, 1, 1, 2, 5, 7, 1, 1, 1, 5, 1, 1, 7, 1, 5...
[ "nonn", "easy" ]
A227626
[ 1, 2, 4, 6, 22, 30, 45, 53, 211, 242, 429, 554, 917, 1239, 1738, 2161, 2986, 3005, 3101, 3307, 4800, 6385, 7308, 15148, 16668, 19287, 28103, 72754, 143406, 457425, 955117, 1129313, 2290339, 7362039, 11374333, 11711400, 11778444, 11896240, 1...
[ "nonn" ]
A000894
[ 1, 6, 60, 700, 8820, 116424, 1585584, 22084920, 312869700, 4491418360, 65166397296, 953799087696, 14062422446800, 208618354980000, 3111393751416000, 46619049708716400, 701342468412012900 ]
[ "nonn", "easy", "changed" ]
A112614
[ 15, 14120, 371515454 ]
[ "nonn", "bref" ]
A121799
[ 1, 1, 2, 4, 2, 12, 4, 8, 26, 2, 8, 18, 16, 2, 6, 12, 4, 32, 30, 6, 40, 60, 22, 12, 208, 18, 48, 168, 18, 76, 6, 232, 48, 4, 50, 78, 28, 236, 68, 1026, 10, 162, 6, 138, 162, 48, 120, 330, 82, 414, 130, 188, 164, ...
[ "nonn" ]
A361036
[ 1, 2, 11, 124, 2225, 56546, 1928707, 85029596, 4687436609, 314255427490, 25077179715131, 2343489559096412, 253185531592066800, 31279831940279656000, 4.3769233367216003e+21, 6.878155360929998e+23, 1.2049148606861277e+26, 2.337873092320689e+28 ]
[ "nonn", "easy" ]
A196859
[ 1, 4, 12, 35, 102, 281, 787, 2237, 6346, 17976, 50903, 144132, 408157, 1155913, 3273609, 9270960, 26255482, 74355847, 210576950, 596357727, 1688896077, 4782984549, 13545499068, 38361099308, 108639331309, 307668565890 ]
[ "nonn" ]
A286423
[ 2, 7, 130, 4207, 1166928, 541240697, 2907639077764, 25886034363696810, 3.341096345926175e+21, 7.137387902044873e+26, 2.6451057783787367e+33, 1.623880890721461e+40 ]
[ "nonn" ]
A188606
[ 88, 7744, 167525, 3648942, 61078115, 1031943536, 16339159241, 260970703443, 4096182114761, 64567134345340, 1012640530801561, 15908699653534156, 249543905145564860, 3916784411012496000, 61447215941006900000 ]
[ "nonn" ]
A078233
[ 3, 27, 2322, 733752, 5327773272, 32322753325273750, 3.5752373373225773e+27 ]
[ "base", "more", "nonn" ]
A270861
[ 3, 1, 8, 7, 2, 1, 15, 7, 13, 3, 1, 1, 24, 23, 22, 21, 4, 3, 2, 1, 35, 17, 11, 8, 31, 5, 2, 1, 1, 1, 48, 47, 46, 45, 44, 43, 6, 5, 4, 3, 2, 1, 63, 31, 61, 15, 59, 29, 57, 7, 3, 5, 1, 3, 1, 1, 80, 79, 2...
[ "nonn", "tabf", "frac" ]
A378993
[ 1, 1, 2, 3, 4, 4, 6, 7, 8, 8, 10, 10, 12, 12, 13, 15, 16, 16, 18, 18, 19, 20, 22, 22, 24, 24, 26, 26, 28, 27, 30, 31, 31, 32, 33, 34, 36, 36, 37, 38, 40, 39, 42, 42, 43, 44, 46, 46, 48, 48, 49, 50, 52, 52, 53...
[ "nonn", "easy" ]
A089117
[ 0, 1, 3, 10, 25, 64, 146, 331, 710, 1505, 3091, 6272, 12473, 24540, 47610, 91527, 174138, 328768, 615720, 1145650, 2117884, 3893630, 7119978, 12958400, 23478010, 42364427, 76148353, 136389128, 243467595, 433263360, 768749914, 1360269093 ]
[ "nonn" ]
A061346
[ 15, 21, 33, 35, 39, 45, 51, 55, 57, 63, 65, 69, 75, 77, 85, 87, 91, 93, 95, 99, 105, 111, 115, 117, 119, 123, 129, 133, 135, 141, 143, 145, 147, 153, 155, 159, 161, 165, 171, 175, 177, 183, 185, 187, 189, 195, 201, 203, ...
[ "nonn", "easy" ]
A139606
[ 6, 21, 36, 51, 66, 81, 96, 111, 126, 141, 156, 171, 186, 201, 216, 231, 246, 261, 276, 291, 306, 321, 336, 351, 366, 381, 396, 411, 426, 441, 456, 471, 486, 501, 516, 531, 546, 561, 576, 591, 606, 621, 636, 651, 666, 681, 69...
[ "easy", "nonn" ]
A066989
[ 1, 9, 251, 16280, 2048824, 444273984, 152759224512, 78340747014144, 57175952894078980, 57223737619918850000, 7.621257949795186e+22, 1.3175893884255367e+26, 2.895842919774109e+29, 7.948607548246996e+32 ]
[ "nonn" ]
A162078
[ 3, 15, 151, 3495, 198503, 28534087, 10586251623, 10294697200775, 26586793509930790, 184408340876752850000, 3.46854364253207e+24, 1.7838817002566404e+29, 2.526639316719521e+34 ]
[ "nonn" ]
A150059
[ 1, 2, 6, 18, 63, 220, 835, 3154, 12570, 49819, 205075, 839526, 3536313, 14817881, 63500843, 270794862, 1176087811, 5084586904, 22320018345, 97564133595, 432038519652, 1905633255140, 8500244263894, 37776633883543, 169546296602137, 758326978376323, 3421466506580925,...
[ "nonn", "walk" ]
A216549
[ 2, 23, 317, 1031, 86453 ]
[ "nonn" ]
A097052
[ 1, 2, 5, 7, 19, 17, 25, 29, 0, 73, 65, 67, 99, 97, 113, 121, 0, 0, 301, 289, 0, 257, 265, 277, 393, 401, 421, 385, 451, 449, 481, 497, 0, 0, 0, 0, 0, 1201, 1161, 1153, 0, 0, 1025, 1033, 1059, 1057, 1105, 1129, 0, 1569,...
[ "nonn" ]
A251880
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[ "nonn" ]
A009401
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[ "sign", "easy" ]
A226899
[ 1, 2, 12, 24, 120, 180, 360, 720, 1260, 2520, 5040, 10080, 15120, 27720, 30240, 50400, 55440, 65520, 83160, 110880, 166320, 221760, 277200, 332640, 360360, 554400, 665280, 720720, 1441440, 2162160, 3603600, 4324320, 7207200, 8648640, 10810800, 14...
[ "nonn" ]
A227578
[ 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 5, 4, 1, 1, 1, 14, 29, 8, 1, 1, 1, 42, 290, 185, 16, 1, 1, 1, 132, 3532, 7680, 1257, 32, 1, 1, 1, 429, 49100, 456033, 238636, 8925, 64, 1, 1, 1, 1430, 750325, 34426812, 77767945, ...
[ "nonn", "tabl" ]
A149942
[ 1, 2, 5, 15, 49, 172, 627, 2364, 9178, 36322, 146349, 598798, 2479100, 10377197, 43854651, 186810219, 801663799, 3462831008, 15043186516, 65697663852, 288296368358, 1270513998501, 5621498699217, 24963796571708, 111226042313882, 497111195713677, 2228180310648286, ...
[ "nonn", "walk" ]
A374579
[ -1, 635318657, 6578, 6834, 7459, 8755, 18755, 23412, 43893, 53893, 92309, 123335, 182566, 232647, 298183, 393848, 521849, 681849, 872105, 1066586, 1343612, 1623453, 1955229, 2412205, 2811596, 3424941, 4132222 ]
[ "sign", "more" ]
A044551
[ 32, 81, 130, 179, 230, 277, 326, 375, 424, 473, 522, 573, 620, 669, 718, 767, 816, 865, 916, 963, 1012, 1061, 1110, 1159, 1208, 1259, 1306, 1355, 1404, 1453, 1502, 1551, 1616, 1649, 1698, 1747, 1796, 1845, 1894, 1945, 1992 ]
[ "nonn", "base" ]
A345937
[ 1, 1, 2, 3, 4, 1, 6, 7, 8, 1, 10, 1, 12, 1, 2, 15, 16, 1, 18, 1, 4, 1, 22, 1, 24, 1, 26, 9, 28, 1, 30, 31, 4, 1, 2, 1, 36, 1, 2, 1, 40, 1, 42, 1, 4, 1, 46, 1, 48, 1, 2, 3, 52, 1, 2, 1, 4, 1, 58, 1, ...
[ "nonn" ]
A197233
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[ "nonn" ]
A040069
[ 2, 3, 5, 7, 11, 17, 23, 29, 31, 41, 47, 53, 59, 67, 71, 79, 83, 89, 101, 107, 113, 131, 137, 149, 167, 173, 179, 191, 197, 223, 227, 229, 233, 239, 251, 257, 263, 269, 277, 281, 283, 293, 311, 317, 331, 347, 353 ]
[ "nonn", "easy" ]
A192102
[ 31572, 141624, 452508, 1341648, 3266172, 7234374, 12259368, 18992502, 23324140, 28129626, 26605908, 26190612, 21568932, 17119818, 13040280, 8948079, 6244308, 3679032, 2431044, 1250109, 640908, 315828, 197568, 57288, 46116, 30366, 25732, 7695, 4104, 2226, 3...
[ "nonn", "fini", "full" ]
A028668
[ 1, 30, 37800, 1755432000, 2946176634240000, 1.781211254235356e+23, 3.877226090711651e+32, 3.0383449623465747e+43, 8.571499972292137e+55, 8.705210793883473e+69 ]
[ "nonn" ]
A125755
[ -2, 4, -2, -11, -14, -20, -32, 4, -2, 16, 13, -2, 40, 4, -11, -14, -20, -2, -32, 4, 16, 13, 40, 4, -2, 40, 58, 49, 76, 43, 61, 70, 58, 112, 85, 67, 148, 112, 61, 88, 106, 88, 160, 133, 196, 304, 277, 148, 130, 184, 2...
[ "sign" ]
A101376
[ 0, 1, 14, 99, 424, 1325, 3366, 7399, 14624, 26649, 45550, 73931, 114984, 172549, 251174, 356175, 493696, 670769, 895374, 1176499, 1524200, 1949661, 2465254, 3084599, 3822624, 4695625, 5721326, 6918939, 8309224, 9914549, 11758950, 13868191, 16269824, ...
[ "nonn", "easy" ]
A324806
[ 1, 1, 4, 27, 256, 3125, 46656, 823536, 16776760, 387399096, 9999087840, 285273493890, 8914479240744, 302804132739108, 11108778138153696, 437740674563572350, 18439146872674690000, 826846479804875900000, 3.932507874186963e+22, 1.977213223548343e+24 ]
[ "easy", "nonn" ]
A008133
[ 0, 0, 0, 1, 1, 2, 4, 4, 6, 9, 9, 12, 16, 16, 20, 25, 25, 30, 36, 36, 42, 49, 49, 56, 64, 64, 72, 81, 81, 90, 100, 100, 110, 121, 121, 132, 144, 144, 156, 169, 169, 182, 196, 196, 210, 225, 225, 240, 256, 256, 272, ...
[ "nonn", "easy" ]
A300710
[ 1, 0, 0, 0, 1, 5, 5, 1, 7, 9, 0, 2, 5, 2, 9, 6, 1, 1, 9, 3, 0, 2, 9, 8, 7, 2, 4, 9, 2, 9, 5, 7, 2, 8, 0, 4, 1, 5, 6, 6, 5, 4, 2, 9, 7, 5, 0, 6, 1, 3, 7, 4, 0, 4, 3, 6, 8, 7, 1, 9, 9, 6, 1, 5...
[ "nonn", "cons" ]
A296492
[ 1, 1, 2, 2, 0, 7, 1, 2, 9, 4, 7, 8, 7, 2, 0, 1, 9, 1, 3, 1, 3, 5, 6, 3, 9, 9, 3, 2, 1, 2, 0, 7, 4, 4, 8, 2, 2, 3, 5, 2, 3, 0, 1, 4, 9, 2, 6, 1, 9, 0, 4, 2, 5, 0, 7, 7, 3, 3, 5, 9, 0, 7, 6, 1...
[ "nonn", "easy", "cons" ]
A216556
[ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 21, 22, 23, 24, 25, 26, 27, 28, 29, 210, 31, 32, 33, 34, 35, 36, 37, 38, 39, 310, 41, 42, 43, 44, 45, 46, 47, 48, 49, 410, 51, 52, 53, 54, 55, 56, 57, 58, 59, 510, 61, 62, 63, 64,...
[ "nonn", "easy", "base" ]
A284727
[ 1, 1, 2, 5, 15, 52, 203, 876, 4111 ]
[ "nonn", "more" ]
A099059
[ 1, 252, 4830, -16744, -113643, 534612, -577738, 1217160, -6905934, 10661420, -4219488, 18643272, -25499225, -73279080, 128406630, -52843168, 134722224, -80873520, -182213314, -145589976, 308120442, -17125708, -548895690, 2687348496, -1696965207, -1740295368, -1596...
[ "sign" ]