cp's OEIS Frontend

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.

A000296 Set partitions without singletons: number of partitions of an n-set into blocks of size > 1. Also number of cyclically spaced (or feasible) partitions.

Table of values

n a(n)
0 1
1 0
2 1
3 1
4 4
5 11
6 41
7 162
8 715
9 3425
10 17722
11 98253
12 580317
13 3633280
14 24011157
15 166888165
16 1216070380
17 9264071767
18 73600798037
19 608476008122
20 5224266196935
21 46499892038437
22 428369924118314
23 4078345814329009
24 40073660040755337
25 405885209254049952
26 4232705122975949401

List of values

[1, 0, 1, 1, 4, 11, 41, 162, 715, 3425, 17722, 98253, 580317, 3633280, 24011157, 166888165, 1216070380, 9264071767, 73600798037, 608476008122, 5224266196935, 46499892038437, 428369924118314, 4078345814329009, 40073660040755337, 405885209254049952, 4232705122975949401]

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

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