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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.

A355874 Expansion of e.g.f. -LambertW(x^2 * log(1-x))/2.

Table of values

n a(n)
0 0
1 0
2 0
3 3
4 6
5 20
6 450
7 3024
8 21840
9 449280
10 5690160
11 68579280
12 1491462720
13 27798076800
14 485405784864
15 11821894207200
16 285057334598400
17 6578025489584640
18 183420564173141760
19 5342163886869062400
20 152988752430721267200
21 4897735504358795965440

List of values

[0, 0, 0, 3, 6, 20, 450, 3024, 21840, 449280, 5690160, 68579280, 1491462720, 27798076800, 485405784864, 11821894207200, 285057334598400, 6578025489584640, 183420564173141760, 5342163886869062400, 152988752430721267200, 4897735504358795965440]

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

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