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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.

A371312 Expansion of e.g.f. Product_{k>=1} 1 / (1 - x^k/k!)^2.

Table of values

n a(n)
0 1
1 2
2 8
3 38
4 228
5 1562
6 12386
7 109286
8 1073988
9 11545994
10 135393438
11 1714890806
12 23380747506
13 341014477390
14 5303722839850
15 87582446980418
16 1531259993710468
17 28254163132485930
18 548854481037814382
19 11196310379931318758
20 239346426732701009838
21 5350768890908294837294

List of values

[1, 2, 8, 38, 228, 1562, 12386, 109286, 1073988, 11545994, 135393438, 1714890806, 23380747506, 341014477390, 5303722839850, 87582446980418, 1531259993710468, 28254163132485930, 548854481037814382, 11196310379931318758, 239346426732701009838, 5350768890908294837294]

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

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