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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.

A276898 Number of ordered 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 3
3 13
4 75
5 541
6 4683
7 47293
8 545835
9 6541426
10 82575992
11 1105638712
12 15740668640
13 238286993344
14 3830996668880
15 65290928665336
16 1177060804189460
17 22361980927148976
18 446348461695232608
19 9336784271669066016
20 204240575957464571232
21 4663193421334759826472

List of values

[1, 1, 3, 13, 75, 541, 4683, 47293, 545835, 6541426, 82575992, 1105638712, 15740668640, 238286993344, 3830996668880, 65290928665336, 1177060804189460, 22361980927148976, 446348461695232608, 9336784271669066016, 204240575957464571232, 4663193421334759826472]

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

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