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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.

A276724 Number of set partitions of [n] such that for each block b the smallest integer interval containing b has at most eight elements.

Table of values

n a(n)
0 1
1 1
2 2
3 5
4 15
5 52
6 203
7 877
8 4140
9 17007
10 64077
11 231180
12 821132
13 2918753
14 10483154
15 38264066
16 142423894
17 533308705
18 1995314365
19 7437442700
20 27604521795
21 102095937121
22 376790770192
23 1389739254904
24 5130664114644
25 18964932885093
26 70170215134155
27 259770146382666

List of values

[1, 1, 2, 5, 15, 52, 203, 877, 4140, 17007, 64077, 231180, 821132, 2918753, 10483154, 38264066, 142423894, 533308705, 1995314365, 7437442700, 27604521795, 102095937121, 376790770192, 1389739254904, 5130664114644, 18964932885093, 70170215134155, 259770146382666]

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

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