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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.

A009083 Expansion of e.g.f. cos(tan(x)^2) (even powers only).

Table of values

n a(n)
0 1
1 0
2 -12
3 -480
4 -22512
5 -1224960
6 -61017792
7 1438993920
8 1844639547648
9 677206700482560
10 225542012911531008
11 76252348319434383360
12 26581103125260630233088
13 9309180001030233433374720

List of values

[1, 0, -12, -480, -22512, -1224960, -61017792, 1438993920, 1844639547648, 677206700482560, 225542012911531008, 76252348319434383360, 26581103125260630233088, 9309180001030233433374720]

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

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