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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.

A324238 Number of set partitions of [n] where all subsets are partitioned into the same number of nonempty subsets.

Table of values

n a(n)
0 1
1 1
2 3
3 9
4 32
5 133
6 625
7 3328
8 20172
9 137073
10 1023610
11 8327069
12 73711863
13 707141074
14 7278630390
15 79522233635
16 916354807657
17 11119419230485
18 142082222254701
19 1908850117706652
20 26862951637197372
21 394233330125117457
22 6013602782397882264
23 95208871146458467659

List of values

[1, 1, 3, 9, 32, 133, 625, 3328, 20172, 137073, 1023610, 8327069, 73711863, 707141074, 7278630390, 79522233635, 916354807657, 11119419230485, 142082222254701, 1908850117706652, 26862951637197372, 394233330125117457, 6013602782397882264, 95208871146458467659]

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

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