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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.

A202365 G.f.: Sum_{n>=0} (n-x)^n * x^n / (1 + n*x - x^2)^n.

Table of values

n a(n)
0 1
1 1
2 2
3 10
4 54
5 336
6 2400
7 19440
8 176400
9 1774080
10 19595520
11 235872000
12 3073593600
13 43110144000
14 647610163200
15 10374216652800
16 176536039680000
17 3180264062976000
18 60466862776320000
19 1210048630382592000
20 25423825985445888000
21 559567461880627200000
22 12874917427270778880000

List of values

[1, 1, 2, 10, 54, 336, 2400, 19440, 176400, 1774080, 19595520, 235872000, 3073593600, 43110144000, 647610163200, 10374216652800, 176536039680000, 3180264062976000, 60466862776320000, 1210048630382592000, 25423825985445888000, 559567461880627200000, 12874917427270778880000]

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

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