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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.

A003717 Expansion of e.g.f. sin(tanh(x)) (odd powers only).

Table of values

n a(n)
0 1
1 -3
2 37
3 -959
4 41641
5 -2693691
6 241586893
7 -28607094455
8 4315903789009
9 -807258131578995
10 183184249105857781
11 -49548882107764546223
12 15742588857552887269753
13 -5802682207845642276301995

List of values

[1, -3, 37, -959, 41641, -2693691, 241586893, -28607094455, 4315903789009, -807258131578995, 183184249105857781, -49548882107764546223, 15742588857552887269753, -5802682207845642276301995]

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

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