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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.

A129906 n!/(n^2) when an integer.

Table of values

n a(n)
1 1
2 20
3 630
4 4480
5 36288
6 3326400
7 444787200
8 5811886080
9 81729648000
10 19760412672000
11 6082255020441600
12 115852476579840000
13 2322315553259520000
14 1077167364120207360000
15 24817936069329577574400
16 596585001666576384000000
17 14936720782466875392000000

List of values

[1, 20, 630, 4480, 36288, 3326400, 444787200, 5811886080, 81729648000, 19760412672000, 6082255020441600, 115852476579840000, 2322315553259520000, 1077167364120207360000, 24817936069329577574400, 596585001666576384000000, 14936720782466875392000000]

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

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