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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.

A009199 Expansion of e.g.f. exp(log(1+x)^2).

Table of values

n a(n)
0 1
1 0
2 2
3 -6
4 34
5 -220
6 1688
7 -14868
8 147684
9 -1631376
10 19821912
11 -262573080
12 3764276712
13 -58044604176
14 957653604672
15 -16828739439120
16 313742795670288
17 -6183918938706048
18 128463999017594016
19 -2804979941504113248

List of values

[1, 0, 2, -6, 34, -220, 1688, -14868, 147684, -1631376, 19821912, -262573080, 3764276712, -58044604176, 957653604672, -16828739439120, 313742795670288, -6183918938706048, 128463999017594016, -2804979941504113248]

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

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