cp's OEIS Frontend

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.

A320760 Number of ordered set partitions of [n] where the maximal block size equals four.

Table of values

n a(n)
4 1
5 10
6 120
7 1540
8 21490
9 326970
10 5402250
11 96500250
12 1855334250
13 38228190000
14 840776937000
15 19666511865000
16 487617137007000
17 12776791730703000
18 352825452012033000
19 10242418813814187000
20 311854958169459705000
21 9937942309809373860000
22 330821844137019184950000

List of values

[1, 10, 120, 1540, 21490, 326970, 5402250, 96500250, 1855334250, 38228190000, 840776937000, 19666511865000, 487617137007000, 12776791730703000, 352825452012033000, 10242418813814187000, 311854958169459705000, 9937942309809373860000, 330821844137019184950000]

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

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