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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A292784 a(n) = n! * [x^n] 1/sqrt(1 - 2*n*x).

Table of values

n a(n)
0 1
1 1
2 12
3 405
4 26880
5 2953125
6 484989120
7 111289483305
8 34007836262400
9 13350287284158825
10 6547290750000000000
11 3922838769902739011325
12 2819575386162274605465600
13 2394486245934541921935898125
14 2371947271643716575046318080000
15 2710687260280640086154937744140625
16 3539907755812512418187309922385920000

List of values

[1, 1, 12, 405, 26880, 2953125, 484989120, 111289483305, 34007836262400, 13350287284158825, 6547290750000000000, 3922838769902739011325, 2819575386162274605465600, 2394486245934541921935898125, 2371947271643716575046318080000, 2710687260280640086154937744140625, 3539907755812512418187309922385920000]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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