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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.

A202139 Expansion of e.g.f. log(1/(1-artanh(x))).

Table of values

n a(n)
0 0
1 1
2 1
3 4
4 14
5 88
6 544
7 4688
8 41712
9 459520
10 5333376
11 71876352
12 1027670016
13 16428530688
14 278818065408
15 5167215464448
16 101437811718144
17 2140879726411776
18 47698275298050048
19 1130276555155243008
20 28167446673847812096
21 740796870212763254784

List of values

[0, 1, 1, 4, 14, 88, 544, 4688, 41712, 459520, 5333376, 71876352, 1027670016, 16428530688, 278818065408, 5167215464448, 101437811718144, 2140879726411776, 47698275298050048, 1130276555155243008, 28167446673847812096, 740796870212763254784]

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

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