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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.

A296853 Expansion of e.g.f. tanh(x*tan(x/2)) (even powers only).

Table of values

n a(n)
0 0
1 1
2 1
3 -27
4 -403
5 8345
6 688473
7 -208019
8 -3189211931
9 -162605047455
10 28806493001105
11 5257860587364341
12 -288068264497990179
13 -230932276247139756887
14 -14420179324444754436023
15 13944106915630111553887485
16 3643613240568912544562868053

List of values

[0, 1, 1, -27, -403, 8345, 688473, -208019, -3189211931, -162605047455, 28806493001105, 5257860587364341, -288068264497990179, -230932276247139756887, -14420179324444754436023, 13944106915630111553887485, 3643613240568912544562868053]

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

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