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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.

A296628 Numerators of coefficients in expansion of e.g.f. tan(x)/tanh(x) (even powers only).

Table of values

n a(n)
0 1
1 4
2 16
3 1408
4 13568
5 606208
6 61878272
7 1956380672
8 21143027712
9 348742016303104
10 279852224852525056
11 5217315235815227392
12 118411884225053589504
13 842233813811702133686272
14 4096134057254358725165056
15 3447514330976633343761929207808
16 44711197753944482628093599547392

List of values

[1, 4, 16, 1408, 13568, 606208, 61878272, 1956380672, 21143027712, 348742016303104, 279852224852525056, 5217315235815227392, 118411884225053589504, 842233813811702133686272, 4096134057254358725165056, 3447514330976633343761929207808, 44711197753944482628093599547392]

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

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