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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.

A375680 Expansion of e.g.f. 1 / (1 + x * log(1 - x^2))^2.

Table of values

n a(n)
0 1
1 0
2 0
3 12
4 0
5 120
6 2160
7 3360
8 120960
9 1632960
10 9979200
11 255467520
12 3592512000
13 45664819200
14 1070840010240
15 18027225216000
16 340344048844800
17 8174882722406400
18 169308486085939200
19 4019018956285132800
20 104511967278630912000
21 2606273308503760896000

List of values

[1, 0, 0, 12, 0, 120, 2160, 3360, 120960, 1632960, 9979200, 255467520, 3592512000, 45664819200, 1070840010240, 18027225216000, 340344048844800, 8174882722406400, 169308486085939200, 4019018956285132800, 104511967278630912000, 2606273308503760896000]

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

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