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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.

A287278 Number of set partitions of [n] such that for each block all absolute differences between consecutive elements are <= six.

Table of values

n a(n)
0 1
1 1
2 2
3 5
4 15
5 52
6 203
7 877
8 3937
9 18162
10 85347
11 405803
12 1942918
13 9339084
14 45003444
15 217201380
16 1049271992
17 5071767524
18 24523356660
19 118602078194
20 573667951966
21 2774998925735
22 13424115897227
23 64941326312858
24 314169695256551
25 1519889795069445
26 7352969270282127

List of values

[1, 1, 2, 5, 15, 52, 203, 877, 3937, 18162, 85347, 405803, 1942918, 9339084, 45003444, 217201380, 1049271992, 5071767524, 24523356660, 118602078194, 573667951966, 2774998925735, 13424115897227, 64941326312858, 314169695256551, 1519889795069445, 7352969270282127]

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

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