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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.

A276897 Number of ordered set partitions of [n] such that for each block b the smallest integer interval containing b has at most seven elements.

Table of values

n a(n)
0 1
1 1
2 3
3 13
4 75
5 541
6 4683
7 47293
8 498542
9 5586952
10 67067528
11 863967424
12 11931711152
13 176258744536
14 2777402228132
15 46453613044464
16 821540685443328
17 15314758450069728
18 300131246157443016
19 6169170736959823656
20 132727347264381285042
21 2983326113743943646918

List of values

[1, 1, 3, 13, 75, 541, 4683, 47293, 498542, 5586952, 67067528, 863967424, 11931711152, 176258744536, 2777402228132, 46453613044464, 821540685443328, 15314758450069728, 300131246157443016, 6169170736959823656, 132727347264381285042, 2983326113743943646918]

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

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