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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.

A296836 Expansion of e.g.f. exp(x*tanh(x/2)) (even powers only).

Table of values

n a(n)
0 1
1 1
2 2
3 3
4 -3
5 20
6 105
7 -5271
8 133826
9 -2714517
10 25525845
11 2131781300
12 -235250824479
13 17527695547713
14 -1124258412169438
15 58383380825728035
16 -975024061456732035
17 -398903577787777972396
18 97649546210035758250281
19 -17069419358223320552890167

List of values

[1, 1, 2, 3, -3, 20, 105, -5271, 133826, -2714517, 25525845, 2131781300, -235250824479, 17527695547713, -1124258412169438, 58383380825728035, -975024061456732035, -398903577787777972396, 97649546210035758250281, -17069419358223320552890167]

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

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