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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.

A355293 Expansion of e.g.f. 1 / (1 - x - x^2/2 - x^3/3).

Table of values

n a(n)
0 1
1 1
2 3
3 14
4 82
5 610
6 5450
7 56700
8 674520
9 9027480
10 134236200
11 2195701200
12 39180094800
13 757389032400
14 15767305554000
15 351689317980000
16 8367381470448000
17 211518767796336000
18 5661504152255952000
19 159954273475764768000
20 4757034049019572320000
21 148547713504322452320000
22 4859583724723970642400000

List of values

[1, 1, 3, 14, 82, 610, 5450, 56700, 674520, 9027480, 134236200, 2195701200, 39180094800, 757389032400, 15767305554000, 351689317980000, 8367381470448000, 211518767796336000, 5661504152255952000, 159954273475764768000, 4757034049019572320000, 148547713504322452320000, 4859583724723970642400000]

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

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