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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.

A216794 Number of set partitions of {1,2,...,n} with labeled blocks and a (possibly empty) subset of designated elements in each block.

Table of values

n a(n)
0 1
1 2
2 12
3 104
4 1200
5 17312
6 299712
7 6053504
8 139733760
9 3628677632
10 104701504512
11 3323151509504
12 115063060869120
13 4316023589937152
14 174347763227738112
15 7545919601962287104
16 348366745238330081280
17 17087957176042900815872
18 887497598764802460352512

List of values

[1, 2, 12, 104, 1200, 17312, 299712, 6053504, 139733760, 3628677632, 104701504512, 3323151509504, 115063060869120, 4316023589937152, 174347763227738112, 7545919601962287104, 348366745238330081280, 17087957176042900815872, 887497598764802460352512]

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

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