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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.

A383163 Expansion of e.g.f. log(1 - (exp(2*x) - 1)/2)^2 / 2.

Table of values

n a(n)
0 0
1 0
2 1
3 9
4 75
5 690
6 7290
7 88536
8 1223628
9 19019664
10 328908720
11 6268688448
12 130615236576
13 2954657491968
14 72128519473920
15 1890266313945600
16 52937770062975744
17 1577901064699594752
18 49877742373556336640
19 1666688195869095124992
20 58704547943954039672832

List of values

[0, 0, 1, 9, 75, 690, 7290, 88536, 1223628, 19019664, 328908720, 6268688448, 130615236576, 2954657491968, 72128519473920, 1890266313945600, 52937770062975744, 1577901064699594752, 49877742373556336640, 1666688195869095124992, 58704547943954039672832]

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

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