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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.

A271796 Number of set partitions of [n] having exactly nine pairs (m,m+1) such that m is in some block b and m+1 is in block b+1.

Table of values

n a(n)
9 0
10 1
11 55
12 1505
13 29324
14 470327
15 6695470
16 88385973
17 1111798442
18 13564841773
19 162467818939
20 1926323411088
21 22746380908378
22 268674567620291
23 3184862187668777
24 37981401796219812
25 456537084216273054
26 5538881542974933954
27 67901571491109849536
28 841799517686212572527

List of values

[0, 1, 55, 1505, 29324, 470327, 6695470, 88385973, 1111798442, 13564841773, 162467818939, 1926323411088, 22746380908378, 268674567620291, 3184862187668777, 37981401796219812, 456537084216273054, 5538881542974933954, 67901571491109849536, 841799517686212572527]

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

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