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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.

A296856 Expansion of e.g.f. cosh(x*tan(x/2)) (even powers only).

Table of values

n a(n)
0 1
1 0
2 3
3 15
4 224
5 4545
6 126753
7 4626076
8 213703095
9 12167727543
10 835893746300
11 68091766034061
12 6483302813035857
13 712860388963255000
14 89585739948801890619
15 12753524767335858733935
16 2040804997678590563632568
17 364567987004433619078313961

List of values

[1, 0, 3, 15, 224, 4545, 126753, 4626076, 213703095, 12167727543, 835893746300, 68091766034061, 6483302813035857, 712860388963255000, 89585739948801890619, 12753524767335858733935, 2040804997678590563632568, 364567987004433619078313961]

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

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