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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.

A303487 a(n) = n! * [x^n] 1/(1 - 4*x)^(n/4).

Table of values

n a(n)
0 1
1 1
2 12
3 231
4 6144
5 208845
6 8648640
7 422463195
8 23781703680
9 1515973484025
10 107941254220800
11 8491022274509775
12 731304510986649600
13 68444451854354701125
14 6916953288171902976000
15 750681472158682148959875
16 87076954662428278259712000
17 10751175443940144673035200625

List of values

[1, 1, 12, 231, 6144, 208845, 8648640, 422463195, 23781703680, 1515973484025, 107941254220800, 8491022274509775, 731304510986649600, 68444451854354701125, 6916953288171902976000, 750681472158682148959875, 87076954662428278259712000, 10751175443940144673035200625]

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

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