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.

A152525 a(n) is the number of unordered pairs of disjoint set partitions of an n-element set.

Table of values

n a(n)
0 0
1 0
2 1
3 7
4 65
5 811
6 12762
7 244588
8 5574956
9 148332645
10 4538695461
11 157768581675
12 6167103354744
13 268758895112072
14 12961171404183498
15 687270616305277589
16 39843719438374998543
17 2512873126513271758171
18 171643113190082528007702
19 12647168303374365311984284

List of values

[0, 0, 1, 7, 65, 811, 12762, 244588, 5574956, 148332645, 4538695461, 157768581675, 6167103354744, 268758895112072, 12961171404183498, 687270616305277589, 39843719438374998543, 2512873126513271758171, 171643113190082528007702, 12647168303374365311984284]

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

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