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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.

A051295 a(0)=1; thereafter, a(m+1) = Sum_{k=0..m} k!*a(m-k).

Table of values

n a(n)
0 1
1 1
2 2
3 5
4 15
5 54
6 235
7 1237
8 7790
9 57581
10 489231
11 4690254
12 49986715
13 585372877
14 7463687750
15 102854072045
16 1522671988215
17 24093282856182
18 405692082526075
19 7242076686885157
20 136599856992122366
21 2714409550073698925
22 56674981258436882463
23 1240409916125255533662

List of values

[1, 1, 2, 5, 15, 54, 235, 1237, 7790, 57581, 489231, 4690254, 49986715, 585372877, 7463687750, 102854072045, 1522671988215, 24093282856182, 405692082526075, 7242076686885157, 136599856992122366, 2714409550073698925, 56674981258436882463, 1240409916125255533662]

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

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