id
stringlengths
7
11
seq
listlengths
1
347
keywords
listlengths
1
8
A042252
[ 25, 26, 51, 332, 383, 1481, 1864, 7073, 16010, 87123, 103133, 1737251, 8789388, 10526639, 19316027, 29842666, 49158693, 128160052, 1587079317, 3302318686, 4889398003, 8191716689, 13081114692 ]
[ "nonn", "cofr", "frac", "easy" ]
A324616
[ 1, 2, 12, 416, 59528, 32265472, 67721176080, 560073696753664, 18415259721236185000, 2.416524076310084e+24, 1.2674330265027033e+30, 2.6583165567854888e+36, 2.2300394287673274e+43, 7.48285359413328e+50, 1.0043349157780807e+59 ]
[ "nonn" ]
A308793
[ 1009, 3329, 8081, 12401, 15889, 19681, 25601, 25841, 26641, 32321, 33329, 33521, 34369, 36929, 41681, 42929, 47809, 53569, 55249, 64849, 70289, 74209, 76081, 85361, 86209, 87649, 88129, 88801, 90001, 93089, 93329, 97649, 98689, 99089, 100049, 101...
[ "nonn" ]
A177791
[ 10, 22, 36, 51, 71, 92, 118, 151, 186, 224, 268, 316, 367, 432, 500, 586, 679, 775, 886, 998, 1114, 1237, 1398, 1586, 1787, 1990, 2196, 2405, 2615, 2830, 3051, 3329, 3626, 3926, 4230, 4536, 4857, 5209, 5565, 5936, 6320, 6715, 7113, ...
[ "nonn" ]
A299541
[ 2, 4, 6, 6, 10, 13, 16, 19, 21, 25, 27, 31, 33, 37, 40, 43, 46, 49, 52, 55, 58, 61, 64, 67, 70, 73, 75, 79, 81, 85, 87, 91, 93, 97, 99, 103, 105, 109, 111, 115, 117, 121, 123, 127, 129, 133, 135, 139, 141, 145, 148, ...
[ "nonn", "easy" ]
A178934
[ 1, 3, 13, 49, 186, 711, 2749, 10705, 41946, 165159, 652765, 2587441, 10278906, 40903047, 162974461, 649984657, 2594199066, 10359577575, 41386654237, 165391648753, 661101690426, 2643012047943, 10567864050493, 42258903778129 ]
[ "nonn", "easy" ]
A039403
[ 13, 31, 103, 123, 130, 132, 134, 135, 136, 137, 138, 139, 143, 153, 163, 173, 183, 193, 213, 231, 301, 310, 312, 314, 315, 316, 317, 318, 319, 321, 341, 351, 361, 371, 381, 391, 413, 431, 513, 531, 613, 631, 713, 731, 813, 831...
[ "nonn", "base", "easy" ]
A368631
[ 1, 1, 7, 118, 3457, 150376, 8869249, 669261160, 62084355505, 6878901271024, 890797404903841, 132568595259161660, 22370325575395443000, 4.2337951074698427e+21, 8.906060817381106e+23, 2.0665173091940857e+26, 5.255087721577001e+28, 1.4564273590596678e+31 ]
[ "nonn" ]
A135657
[ 55, 175, 247, 295, 319, 343, 391, 415, 511, 535, 559, 583, 655, 679, 703, 775, 799, 847, 871, 895, 943, 1015, 1111, 1135, 1159, 1183, 1207, 1255, 1351, 1375, 1495, 1519, 1591, 1615, 1639, 1687, 1711, 1735, 1807, 1855, 1903, 1927, 19...
[ "nonn", "easy" ]
A108587
[ 6, 12, 18, 25, 31, 37, 44, 50, 56, 63, 69, 75, 82, 88, 94, 100, 107, 113, 119, 126, 132, 138, 145, 151, 157, 164, 170, 176, 182, 189, 195, 201, 208, 214, 220, 227, 233, 239, 246, 252, 258, 264, 271, 277, 283, 290, 296, 302...
[ "nonn" ]
A153768
[ 11, 29, 31, 109, 199, 251, 269, 379, 419, 521, 599, 601, 661, 881, 991, 1091, 1231, 1289, 1789, 1831, 1861, 1901, 1949, 2239, 2689, 2969, 3181, 3251, 3301, 3359, 3499, 3779, 3821, 4099, 4201, 4339, 4561, 4651, 4679, 4789, 4871, 5281, ...
[ "nonn", "easy" ]
A217130
[ 0, 1, 3, 16, 36, 244, 315, 2577, 9500, 17596, 25551, 32193, 32835, 36504, 75136 ]
[ "nonn" ]
A042731
[ 1, 1, 11, 12, 707, 719, 7897, 8616, 507625, 516241, 5670035, 6186276, 364474043, 370660319, 4071077233, 4441737552, 261691855249, 266133592801, 2923027783259, 3189161376060, 187894387594739, 191083548970799, 2098729877302729, 2289813426273528 ]
[ "nonn", "frac", "easy" ]
A258690
[ 1, 1, 3, 8, 32, 167, 1096, 8117, 67859, 627649, 6394781, 71201812, 861677250, 11270215084, 158564826122, 2389093936957, 38396351412220, 655832914215010, 11865953978478454, 226724258401651140, 4562163514498852400, 96430112680094190000, 2.1360246714223637e+21 ]
[ "nonn" ]
A064360
[ 1, 2, 3, 5, 4, 10, 6, 20, 7, 34, 11, 52, 15, 9, 21, 8, 27 ]
[ "nonn" ]
A283626
[ 1, 4, 7, 13, 13, 25, 19, 38, 37, 49, 31, 74, 37, 73, 79, 104, 49, 125, 55, 143, 121, 121, 67, 203, 121, 145, 171, 221, 85, 263, 91, 272, 205, 193, 199, 354, 109, 217, 247, 383, 121, 398, 127, 377, 381, 265, 139, 531, 253...
[ "nonn" ]
A272721
[ 13, 23, 35, 50, 66, 83, 103, 123, 146, 170, 196, 223 ]
[ "nonn", "more" ]
A222064
[ 0, 1, 8, 69, 674, 7455, 92540, 1276569, 19394870, 321982323, 5801055632, 112753640109, 2352074473226, 52419496769991, 1243115350746404, 31257697673933890, 830700701852539800, 23266435856618602000, 684997785857198900000, 2.1149644833172897e+22 ]
[ "nonn" ]
A265862
[ 1, 6, 1462, 1584088, 8616332520, 71643177829872, 1642669067898696700 ]
[ "nonn" ]
A114289
[ 0, 1, 7, 31, 116, 379, 1133, 3210, 8803, 23701, 63239, 168287, 447905, 1194814, 3196180, 8576505, 23081668, 62292381, 168536249, 457035453, 1241954405, 3381289332, 9221603416, 25189382006, 68906572413, 188750887991 ]
[ "nonn" ]
A096029
[ 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 5, 6, 7, 7, 8, 8, 7, 9, 9, 7, 8, 10, 9, 8, 11, 11, 10, 9, 12, 12, 12, 11, 12, 12, 13, 12, 10, 11, 14, 14, 13, 12, 14, 13, 15, 15, 16, 16, 12, 15, 14, 17, 17, 14, 17, 15, ...
[ "nonn" ]
A369399
[ 1, 1, 1, 3, 11, 31, 86, 277, 937, 3095, 10275, 35091, 121662, 423286, 1481648, 5232315, 18601843, 66436069, 238327939, 858805613, 3106856141, 11277393837, 41062303214, 149948280259, 549027748390, 2015108865850, 7412690394406, 27324968423054 ]
[ "nonn" ]
A122310
[ 0, 1, 2, 3, 5, 6, 4, 7, 8, 12, 13, 15, 16, 19, 11, 14, 9, 18, 20, 10, 17, 21, 22, 31, 32, 34, 35, 36, 40, 41, 43, 47, 53, 52, 44, 56, 60, 30, 33, 39, 42, 51, 28, 37, 24, 49, 50, 25, 55, 57, 61, 29, 38, 23, 48...
[ "nonn" ]
A140535
[ 211, 419, 421, 631, 839, 1049, 1051, 1259, 1471, 1889, 2099, 2309, 2311, 2521, 2729, 2731, 2939, 3359, 3361, 3571, 3779, 3989, 4201, 4409, 4621, 4831, 5039, 5669, 5879, 5881, 6089, 6091, 6299, 6301, 6719, 7349, 7351, 7559, 7561, 8191, 8...
[ "nonn", "easy" ]
A066343
[ 3, 6, 9, 13, 16, 19, 23, 26, 29, 33, 36, 39, 43, 46, 49, 53, 56, 59, 63, 66, 69, 73, 76, 79, 83, 86, 89, 93, 96, 99, 102, 106, 109, 112, 116, 119, 122, 126, 129, 132, 136, 139, 142, 146, 149, 152, 156, 159, 162, 166, ...
[ "easy", "nonn" ]
A335603
[ 0, 1, 2, 2, 3, 2, 4, 3, 4, 3, 5, 4, 6, 4, 3, 4, 7, 4, 8, 6, 4, 5, 9, 6, 6, 6, 6, 8, 10, 3, 11, 5, 5, 7, 4, 4, 12, 8, 6, 9, 13, 4, 14, 10, 6, 9, 15, 8, 8, 6, 7, 12, 16, 6, 5, 12, 8, 10, 17, 6, 18, ...
[ "nonn" ]
A316900
[ 2, 4, 8, 16, 18, 32, 36, 64, 72, 128, 144, 162, 195, 250, 256, 288, 294, 324, 390, 500, 512, 576, 588, 648, 780, 1000, 1024, 1125, 1152, 1176, 1296, 1458, 1560, 1755, 2000, 2048, 2250, 2304, 2352, 2592, 2646, 2916, 3120, 3185, 3...
[ "nonn" ]
A180342
[ 2, 34, 4, 46, 6, 50, 76, 194, 100, 144, 366, 10, 730, 324, 374, 254, 286, 266, 886, 274, 14, 794, 610, 546, 16, 456, 494, 334, 724, 964, 520, 526, 834, 664, 1596, 504, 3510, 20, 2720, 1234, 1120, 516, 566, 874, 810, 756, 113...
[ "nonn" ]
A004259
[ 0, 10, 15, 20, 23, 25, 28, 30, 31, 33, 34, 35, 37, 38, 39, 40, 40, 41, 42, 43, 43, 44, 45, 45, 46, 47, 47, 48, 48, 49, 49, 50, 50, 50, 51, 51, 52, 52, 52, 53, 53, 53, 54, 54, 54, 55, 55, 55, 56, 56, 56, 57, 57, ...
[ "nonn" ]
A328746
[ 0, 1, 1, 1, 2, 5, 72, 12151, 53146457 ]
[ "nonn", "hard", "more" ]
A099014
[ 0, 1, 5, 20, 87, 365, 1552, 6565, 27825, 117844, 499235, 2114729, 8958240, 37947545, 160748653, 680941780, 2884516383, 12219006325, 51760543280, 219261176861, 928805254905, 3934482189716, 16666734024715, 70601418270865 ]
[ "nonn", "easy" ]
A262224
[ 1, 2, 4, 8, 16, 22, 44, 88, 176, 183, 191, 382, 390, 399, 498, 507, 514, 519, 528, 536, 542, 547, 554, 609, 618, 626, 1252, 1504, 1509, 1518, 1669, 1735, 1742, 1749, 1758, 1766, 1832, 1840, 1848, 2696, 3392, 3425, 3430, 3773, 75...
[ "nonn", "base" ]
A084372
[ 4, 6, 10, 14, 35, 22, 26, 65, 34, 38, 95, 46, 115, 161, 58, 62, 155, 217, 74, 185, 82, 86, 215, 94, 235, 329, 106, 265, 371, 118, 122, 305, 427, 134, 335, 142, 146, 365, 511, 158, 395, 166, 415, 581, 178, 445, 623, 1501, ...
[ "nonn", "look" ]
A336483
[ 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 1, 6, 11, 16, 21, 26, 31, 36, 41, 46, 2, 7, 12, 17, 22, 27, 32, 37, 42, 47, 3, 8, 13, 18, 23, 28, 33, 38, 43, 48, 4, 9, 14, 19, 24, 29, 34, 39, 44, 49, 5, 10, 15, 20, 25,...
[ "nonn", "base", "easy" ]
A181074
[ 1, 1, 2, 5, 23, 231, 5405, 322799, 42761356, 12597156231, 9136063939651, 14655841196011960, 51639276405198970000, 4.492126314070109e+23, 8.871353886432412e+27, 3.787931802514258e+32 ]
[ "nonn" ]
A005268
[ 1, 1, 2, 4, 10, 31, 120, 578, 3422, 24504, 208833, 2086777, 24123293, 318800755, 4766262421, 79874304340, 1488227986802 ]
[ "nonn", "more" ]
A373342
[ 1, 3, 11, 257, 10409849, 1.3140065160047459e+22, 2.1553582667127298e+88 ]
[ "nonn" ]
A059136
[ 4, 10, 4, 16, 22, 16, 4, 10, 4, 28, 34, 28, 4, 10, 4, 16, 22, 16, 4, 10, 4, 40, 46, 40, 4, 10, 4, 16, 22, 16, 4, 10, 4, 28, 34, 28, 4, 10, 4, 16, 22, 16, 4, 10, 4, 52, 58, 52, 4, 10, 4, 16, 22, 16, 4, 10, ...
[ "easy", "nonn" ]
A100624
[ 0, 3, 10, 27, 62, 135, 282, 589, 1204, 2437, 4904, 9847, 19734, 39511, 79066, 158187, 316430, 632919, 1265898, 2531865, 5063800, 10127673, 20255420, 40510931 ]
[ "nonn" ]
A140543
[ 83, 151, 389, 457, 491, 593, 661, 797, 967, 1069, 1103, 1171, 1307, 1409, 1511, 1579, 1613, 1783, 1987, 2089, 2293, 2531, 2633, 2803, 2837, 2939, 3041, 3109, 3313, 3347, 3449, 3517, 3823, 4027, 4129, 4231, 4639, 4673, 4877, 5081, 5387, ...
[ "nonn", "easy" ]
A327849
[ 157, 4789, 12615, 46257, 78765, 120147, 201069, 46343011, 156666811, 1235649115, 45728246203, 78080354869, 95882561515, 775752845083 ]
[ "nonn", "more" ]
A085507
[ 0, 0, 1, 4, 13, 41, 136, 505, 2171, 10693, 58246, 340242, 2095435, 13492077, 90267633, 623383765, 4414350135, 31899350954, 235002008725, 1773013299342, 13855253098226, 114135759054965, 1010686200326760, 9744658443894282, 102153128291263120, 1147158516520205300 ]
[ "nonn" ]
A312829
[ 1, 4, 8, 9, 10, 14, 24, 28, 32, 26, 28, 31, 44, 52, 56, 49, 44, 52, 60, 74, 80, 72, 68, 65, 82, 88, 102, 97, 90, 92, 94, 112, 116, 118, 116, 111, 122, 122, 140, 133, 136, 140, 140, 152, 150, 156, 152, 157, 170, 168 ]
[ "nonn" ]
A199303
[ 3, 11, 13, 31, 101, 113, 131, 311, 313, 1031, 1033, 1103, 1301, 3011, 3301, 10301, 10333, 11003, 11311, 13331, 30011, 30103, 31013, 31033, 33013, 33301, 101333, 110311, 113011, 113131, 131311, 133033, 133103, 301331, 301333, 330331, 333101, 3...
[ "nonn", "base" ]
A091701
[ 1, 3, 14, 63, 287, 1306, 5945, 27061, 123180, 560707, 2552301, 11617904, 52883925, 240724103, 1095760078, 4987826867, 22704255571, 103348258626, 470434387405, 2141385987489, 9747446339348, 44369726286423, 201968037801353 ]
[ "nonn" ]
A268992
[ 23, 278, 3331, 37987, 421450, 4583103, 49084071, 519385102, 5442503771, 56571775611, 584048456162, 5994862809815, 61225907059807, 622579765715526, 6306473266306611, 63664757730483920, 640753995659371100 ]
[ "nonn" ]
A183093
[ 0, 1, 1, 1, 1, 3, 1, 1, 1, 3, 1, 4, 1, 3, 3, 1, 1, 4, 1, 4, 3, 3, 1, 5, 1, 3, 1, 4, 1, 7, 1, 1, 3, 3, 3, 5, 1, 3, 3, 5, 1, 7, 1, 4, 4, 3, 1, 6, 1, 4, 3, 4, 1, 5, 3, 5, 3, 3, 1, 10, 1, 3, 4, ...
[ "nonn" ]
A181050
[ 1, 5, 2, 4, 9, 6, 5, 3, 4, 4, 4, 1, 7, 8, 9, 4, 9, 1, 2, 8, 2, 1, 2, 2, 3, 0, 9, 4, 0, 6, 2, 5, 5, 6, 2, 3, 2, 4, 6, 8, 4, 6, 0, 4, 2, 9, 9, 9, 9, 4, 6, 8, 1, 1, 5, 3, 6, 9, 2, 1, 1, 5, 0, 9...
[ "cons", "nonn" ]
A140586
[ 1, 1, 1, 1, 2, 1, 1, 3, 3, 1, 1, 4, 6, 4, 1, 1, 5, 0, 10, 5, 1, 1, 6, 15, 0, 15, 6, 1, 1, 7, 21, 0, 35, 21, 7, 1, 1, 8, 28, 0, 0, 56, 28, 8, 1, 1, 9, 36, 84, 0, 0, 84, 36, 9, 1, 1, 10, 45, 120, 0, ...
[ "nonn", "tabl" ]
A043065
[ 1, 2, 9, 10, 11, 12, 13, 14, 15, 16, 65, 74, 83, 92, 101, 110, 119, 128, 513, 521, 529, 537, 545, 553, 561, 569, 578, 586, 594, 602, 610, 618, 626, 634, 643, 651, 659, 667, 675, 683, 691, 699, 708, 716, 724, 732, 740, 748,...
[ "nonn", "base" ]
A249698
[ 1, 0, 6, 0, 2426, 0, 7553776, 0, 90192976308, 0, 2939813898295990, 0, 213701821328573760000, 0, 3.0292525174041077e+25, 0, 7.60930283862992e+30, 0, 3.15288611008018e+36, 0, 2.03814353326376e+42 ]
[ "nonn" ]
A347372
[ 21, 49, 64, 93, 87, 148, 108, 268, 226, 232, 201, 453, 229, 408, 386, 733, 337, 791, 425, 941, 628, 718, 625, 1695, 715, 1101, 1147, 1642, 930, 1786, 1048, 2844, 1444, 1848, 1495, 3452, 1500, 2424, 2192, 4192, 2000, 3585, 2220, 41...
[ "nonn", "hard" ]
A106065
[ 11, 29, 41, 71, 79, 139, 149, 181, 251, 379, 401, 431, 491, 569, 659, 701, 709, 809, 821, 991, 1021, 1051, 1231, 1289, 1381, 1471, 1549, 1759, 1871, 1931, 1999, 2069, 2221, 2251, 2381, 2459, 2591, 2671, 2711, 2909, 2939, 3301, 3371,...
[ "nonn" ]
A340797
[ 1, 7, 14, 24, 40, 48, 60, 84, 120, 168, 240, 336, 360, 420, 672, 720, 840, 1260, 1680, 2520, 3360, 5040, 7560, 10080, 15120, 20160, 25200, 27720, 30240, 43680, 45360, 50400, 55440, 65520, 83160, 98280, 110880, 131040, 166320, 196560, 22...
[ "nonn", "base" ]
A231893
[ 3, 7, 46, 4436, 134281216 ]
[ "dead" ]
A137197
[ 1, 0, 9, 2, 3, 6, 3, 7, 9, 1, 0, 9, 5, 1, 2, 2, 7, 8, 8, 8, 0, 1, 3, 8, 0, 4, 2, 4, 4, 8, 9, 0, 9, 7, 0, 5, 8, 8, 7, 1, 5, 0, 4, 6, 4, 4, 7, 1, 0, 8, 1, 4, 2, 4, 4, 2, 3, 8, 0, 5, 4, 9, 7, 5...
[ "easy", "nonn", "base", "cons" ]
A327679
[ 1, 1, 4, 18, 112, 732, 6156, 53720, 559584, 6138216, 76636080, 1006039320, 14693223032, 224774090592, 3756082129296, 65650522695344, 1236568354232176, 24299076684879264, 509677108276779140, 11124779898457678000, 257204596479739400000, 6.174928911548312e+21 ]
[ "nonn" ]
A017474
[ 49, 324, 841, 1600, 2601, 3844, 5329, 7056, 9025, 11236, 13689, 16384, 19321, 22500, 25921, 29584, 33489, 37636, 42025, 46656, 51529, 56644, 62001, 67600, 73441, 79524, 85849, 92416, 99225, 106276, 113569, 121104, 128881, 136900, 145161, 153664, ...
[ "nonn", "easy" ]
A011304
[ 1, 1, 2, 7, 3, 7, 8, 2, 0, 4, 1, 5, 7, 8, 3, 3, 0, 2, 4, 1, 4, 3, 0, 7, 8, 0, 1, 9, 8, 1, 3, 4, 3, 4, 7, 5, 3, 4, 5, 0, 8, 6, 3, 7, 6, 6, 5, 1, 8, 8, 9, 1, 9, 2, 6, 8, 6, 9, 3, 5, 9, 1, 2, 2...
[ "nonn", "cons" ]
A199414
[ 11, 61, 361, 2161, 12961, 77761, 466561, 2799361, 16796161, 100776961, 604661761, 3627970561, 21767823361, 130606940161, 783641640961, 4701849845761, 28211099074561, 169266594447361, 1015599566684161, 6093597400104961, 36561584400629760 ]
[ "nonn", "easy" ]
A323068
[ 0, 0, 1, 1, 0, 2, 0, 2, 1, 0, 0, 4, 0, 0, 2, 2, 0, 3, 0, 1, 1, 0, 0, 5, 0, 0, 1, 1, 0, 4, 0, 2, 1, 0, 1, 6, 0, 0, 1, 2, 0, 2, 0, 1, 2, 0, 0, 6, 0, 0, 1, 1, 0, 3, 0, 2, 1, 0, 0, 6, 0, 0, 1, 2...
[ "nonn" ]
A062274
[ 0, 0, 1, 7, 45, 291, 2030, 15695, 135045, 1287243, 13495669, 154516663, 1919455487, 25721712601, 369942275033 ]
[ "nonn", "more" ]
A281786
[ 2, 3, 3, -24, 3, 18, -24, 24, 3, -24, 18, 36, -24, 42, 24, -144, 3, 54, -24, 60, 18, -192, 36, 72, -24, 93, 42, -24, 24, 90, -144, 96, 3, -288, 54, 144, -24, 114, 60, -336, 18, 126, -192, 132, 36, -144, 72, 144, -24, 1...
[ "sign" ]
A186963
[ 2, 2, 2, 3, 4, 3, 4, 5, 4, 4, 6, 5, 6, 7, 6, 7, 6 ]
[ "nonn", "more" ]
A340314
[ 1, 2, 5, 11, 27, 63, 155, 376, 922, 2245, 5506 ]
[ "nonn", "more" ]
A178050
[ 17, 26261, 90017, 138401, 176417, 562517, 788561, 2022101, 2683061, 4743701, 5336117, 9622421, 11614481, 13927841, 21344417, 21734261, 22184117, 38192417, 59629301, 64448801, 68558417, 79923617, 82301201, 89302517, 90098081, 91814741, 95648417 ]
[ "nonn" ]
A370551
[ 1, 1, 0, -5, -3, -73, -11, -2795, -3055, -58643, -2561, -4197973, -614635, -61269445, -3871801, -1495930487, -23794993, -26949145375, -1677354925, -1013112936505, -30432904645, -459074207581145, -2099373575975, -6497000065206625, -11053607615333932, -239235470859971...
[ "sign", "frac", "easy" ]
A265914
[ 1, 1, 3, 38, 549, 28728, 1692417, 377919174, 93177169027, 91255604983167, 98333935794279060, 431583106977641800000, 2.0815007147094646e+24, 4.147613605084172e+28, 9.079514209950333e+32, 8.282933967312247e+37 ]
[ "nonn", "walk", "hard" ]
A384551
[ 1, 3203713013, 1932972153, 1624740557, 1389418801, 4217959141, 2827253801, 893574717, 199498593, 3372915413, 1317388505, 4223549101, 4071519889, 2136354757, 2590104201, 3373966365, 498440897, 1477255605, 4031313209, 3032874637, 784349169, 1495654565 ]
[ "nonn", "easy" ]
A376592
[ 2, 3, 5, 6, 7, 8, 10, 13, 15, 17, 19, 20, 22, 23, 25, 26, 28, 29, 30, 31, 34, 36, 37, 38, 39, 41, 42, 44, 45, 46, 47, 49, 50, 51, 52, 54, 57, 59, 60, 61, 63, 64, 66, 67, 69, 70, 72, 73, 74, 75, 76, 77, 78, 80, ...
[ "nonn" ]
A147014
[ 1, 1, 1, 1, 1, 1, 5, 13, 31, 111, 377, 1545, 10231, 72633, 559663, 5155711, 55582209, 698619471, 11001973207, 206072905483, 4521907343165, 116328599746355, 3545239477906611, 127491366766265470 ]
[ "nonn" ]
A210316
[ 19186, 16048775, 11186190570, 7415631633670, 4840385164324833, 3143730516432515000, 2.038470253990478e+21, 1.3210892600796842e+24, 8.56020376460071e+26, 5.546399669300514e+29 ]
[ "nonn" ]
A098425
[ 1, 2, 10, 30, 31, 20, 32, 11, 21, 22, 12, 100, 300, 301, 200, 302, 101, 201, 202, 102, 110, 310, 311, 210, 312, 111, 211, 212, 112, 120, 320, 321, 220, 322, 121, 221, 222, 122, 130, 330, 331, 230, 332, 131, 231, 232, 132, ...
[ "base", "easy", "nonn" ]
A386068
[ 3, 7, 37, 73, 79, 97, 307, 337, 373, 379, 397, 709, 733, 739, 773, 797, 907, 937, 977, 997, 3037, 3079, 3307, 3373, 3709, 3733, 3739, 3779, 3793, 3797, 3907, 7039, 7079, 7307, 7309, 7333, 7393, 7703, 7793, 7907, 7933, 7937, 7993, ...
[ "nonn", "base", "easy" ]
A168595
[ 1, 4, 36, 358, 3748, 40404, 443886, 4941654, 55555236, 629285416, 7170731236, 82108083204, 943960439086, 10889085499348, 125974782200478, 1461030555025458, 16981658850393252, 197757344280343970 ]
[ "nonn" ]
A078643
[ 2, 3, 5, 7, 8, 9, 11, 13, 14, 15, 18, 21, 22, 23, 24, 29, 34, 35, 36, 37, 39, 47, 55, 56, 57, 58, 60, 63, 76, 89, 90, 91, 92, 94, 97, 102, 123, 144, 145, 146, 147, 149, 152, 157, 165, 199, 233, 234, 235, 236, 238, ...
[ "nonn" ]
A374460
[ 7, 18, 20, 24, 31, 39, 41, 63, 69, 74, 86, 89, 91, 97, 98, 109, 115, 121, 131, 135, 154, 161, 167, 174, 177, 179, 189, 194, 200, 211, 212, 223, 234, 243, 244, 249, 250, 265, 266, 268, 273, 290, 296, 302, 314, 325, 328, 338...
[ "nonn", "easy" ]
A121698
[ 1, 1, 1, 2, 2, 2, 6, 8, 7, 3, 16, 36, 37, 23, 8, 62, 172, 220, 166, 80, 20, 230, 844, 1383, 1338, 835, 338, 72, 1114, 4796, 9331, 10828, 8265, 4282, 1452, 252, 5268, 27450, 64612, 91023, 85248, 55445, 25158, 7524, 1152, 30702,...
[ "nonn", "tabl" ]
A108419
[ 2357, 2753, 3257, 3527, 5237, 5273, 7253, 7523, 22573, 23357, 23537, 23557, 23753, 25237, 25357, 25373, 25537, 25733, 27253, 32257, 32537, 32573, 35227, 35257, 35327, 35527, 37253, 52237, 52733, 53327, 53527, 57223, 72253, 72353, 72533, 73523, ...
[ "base", "nonn" ]
A006836
[ 1, 0, 0, -1, -2, -5, -10, -20, -41, -86, -182, -393, -853, -1887, -4208, -9445, -21350, -48612, -111307, -255236, -590543, -1362919, -3182137, -7362611, -17377129, -40125851, -96106251, -219681825, -539266908, -1200140540 ]
[ "sign" ]
A325705
[ 1, 1, 0, 1, 3, 2, 4, 3, 7, 8, 16, 15, 24, 28, 39, 44, 68, 80, 98, 130, 167, 200, 259, 320, 396, 497, 601, 737, 910, 1107, 1335, 1631, 1983, 2372, 2887, 3439, 4166, 4949, 5940, 7043, 8450, 9980, 11884, 13984, 16679, 19493, 23...
[ "nonn" ]
A173920
[ 0, 0, 1, 0, 1, 0, 0, 1, 1, 2, 0, 1, 0, 1, 0, 0, 1, 0, 1, 1, 2, 0, 1, 1, 2, 0, 1, 1, 0, 1, 1, 2, 1, 2, 2, 3, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 2, 0, 1, 0, 1, 1, 2, 1, 2, 0...
[ "nonn", "tabl" ]
A295730
[ -1, 0, 0, 1, 3, 6, 13, 23, 44, 75, 135, 226, 393, 651, 1108, 1823, 3059, 5010, 8325, 13591, 22428, 36531, 59983, 97538, 159569, 259155, 422820, 686071, 1117083, 1811346, 2944813, 4772543, 7750124, 12555435, 20371095, 32992066, 53494233, 86617...
[ "easy", "sign" ]
A387759
[ 1, 4, 9, 10, 21, 20, 22, 15, 25, 6, 8, 27, 14, 16, 35, 12, 26, 33, 28, 32, 49, 18, 34, 39, 38, 40, 57, 44, 46, 55, 24, 51, 50, 52, 45, 63, 65, 36, 56, 69, 58, 62, 87, 68, 70, 153, 74, 76, 111, 80, 82, 75, 81, 8...
[ "nonn" ]
A281731
[ 1, -1, -2, 0, 5, 0, -10, 2, 18, 0, -32, 0, 55, -5, -90, 0, 144, 0, -226, 10, 346, 0, -522, 0, 777, -18, -1138, 0, 1648, 0, -2362, 32, 3348, 0, -4704, 0, 6554, -55, -9056, 0, 12425, 0, -16932, 90, 22922, 0, -30848, 0, 412...
[ "sign" ]
A250439
[ 3600, 60000, 1000000, 8750000, 76562500, 450187500, 2647102500, 11859019200, 53128406016, 195165573120, 716934758400, 2263282560000, 7144929000000, 20012416875000, 56053297265625, 142499937937500, 362266508890000 ]
[ "nonn" ]
A036808
[ 1, 1, 1, 1, 2, 3, 4, 4, 5, 7, 11, 13, 15, 17, 23, 34, 40, 44, 52, 67, 98, 111, 124, 143, 184, 257, 290, 321, 372, 467, 640, 715, 793, 911, 1133, 1509, 1684, 1860, 2134, 2617, 3424, 3801, 4202, 4796, 5828, 7484, 8292, 9148,...
[ "nonn" ]
A288495
[ 1, 10, 10, 100, 10100, 11000, 1000, 11010000, 101010000, 110100000, 10100000, 110101000000, 1010101000000, 1100110000000, 110010000000, 1100010100000000, 10111010100000000, 11110101000000000, 10101000000000, 11000101010000000000, 101110101010000000000 ]
[ "nonn", "easy" ]
A206515
[ 186, 10998, 695541, 44350086, 2830665213, 180689239504, 11534052523389, 736261766040550, 46998354497911530, 3000081595834713600, 191506483600891870000, 1.222457859921177e+22, 7.803407964249073e+23 ]
[ "nonn" ]
A111319
[ 2, 3, 9, 11, 17, 25, 29, 31, 51, 53, 57, 62, 71, 77, 85, 89, 91, 101, 103, 105, 116, 118, 131, 147, 153, 156, 159, 167, 173, 180, 186, 188, 190, 195, 209, 226, 230, 239, 242, 245, 256, 259, 261, 266, 268, 283, 292, 298, ...
[ "nonn" ]
A334844
[ 1, 3, 1, 1, 4, 4, 2, 4, 9, 8, 2, 1, 5, 5, 4, 7, 0, 4, 5, 5, 4, 5, 4, 9, 4, 6, 5, 3, 7, 6, 1, 9, 6, 5, 1, 1, 7, 9, 4, 8, 9, 9, 0, 5, 0, 7, 6, 6, 1, 9, 2, 1, 8, 4, 2, 1, 5, 3, 4, 6, 1, 6, 0, 1...
[ "nonn", "cons", "easy" ]
A244632
[ 0, 23, 92, 207, 368, 575, 828, 1127, 1472, 1863, 2300, 2783, 3312, 3887, 4508, 5175, 5888, 6647, 7452, 8303, 9200, 10143, 11132, 12167, 13248, 14375, 15548, 16767, 18032, 19343, 20700, 22103, 23552, 25047, 26588, 28175, 29808, 31487, 33212,...
[ "nonn", "easy" ]
A251427
[ 80, 1128, 9120, 94452, 863840, 7658288, 64105154, 526064608, 4251906158, 34199112972, 274205462432, 2196305116240, 17580163235182, 140685755592632 ]
[ "nonn" ]
A119125
[ 1, 6, 66, 666, 6441, 41616, 146611, 464166, 1464616, 4114146, 14116641, 664611111, 1164441411, 16646464416, 41641661166, 66114661161, 144161141446, 161646441166, 1464464661166, 4464411144441, 44416146616416, 61116114144646, 466141616644641, 1116644466666141, 116166644...
[ "nonn", "base" ]
A120722
[ 0, 1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 24, 75, 192, 305, 657, 1616, 2454, 4962, 13360, 20069, 40221, 120860, 181335, 362760, 1209464, 1814257, 3628656, 13305447, 19958232, 39916629, 159667010, 239500605, 479001404, 2075673390, 3113510176 ]
[ "nonn", "less" ]
A287709
[ 1, 1, 1, 2, 4, 9, 22, 57, 154, 430, 1234, 3625, 10865, 33136, 102598, 321913, 1021963, 3278543, 10617413, 34678693, 114151769, 378436049, 1262822229, 4239469076, 14312153289, 48567846377, 165610404277, 567259571451, 1951218773118, 6738242931451, 2335614895...
[ "nonn" ]
A224489
[ 1, 1, 3, 1, 1, 1, 1, 4, 4, 6, 4, 6, 1, 1, 9, 10, 1, 6, 4, 7, 1, 4, 3, 4, 3, 10, 4, 4, 1, 1, 1, 10, 1, 7, 6, 12, 1, 9, 6, 3, 1, 1, 6, 3, 1, 1, 1, 3, 3, 4, 4, 21, 4, 1, 3, 1, 6, 4, 1, 10, 3, 1, ...
[ "nonn" ]
A093793
[ 2, 6, 22, 94, 622, 910, 1058, 1306, 4430, 18914, 23654, 35630, 52846, 63498, 85630 ]
[ "nonn" ]
A009107
[ 1, 0, -8, 56, 512, -54912, 2590336, -69311488, -3936710656, 914002857984, -81770855727104, -2175764106870784, 2405710131432685600, -359158536158603400000, -1.0686552498832713e+23 ]
[ "sign" ]
A161339
[ 1, 3, 5, 8, 12, 16, 20, 24, 29, 35, 41, 47, 53, 59, 65, 72, 80, 88, 96, 104, 112, 120, 128, 136, 145, 155, 165, 175, 185, 195, 205, 215, 225, 235, 245, 256, 268, 280, 292, 304, 316, 328, 340, 352, 364, 376, 388, 400, 413...
[ "easy", "nonn" ]