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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.

A318398 Number of triples of set partitions of {1,2,...,n} whose meet is {{1},{2},...,{n}}.

Table of values

n a(n)
1 1
2 7
3 103
4 2707
5 110857
6 6517129
7 521167549
8 54510591469
9 7235648605909
10 1190181847444189
11 237953165658759679
12 56905537750421669449
13 16059682765076576965879
14 5287171379685771887014489
15 2010360123437921314268936809
16 875173620070717892287441139989

List of values

[1, 7, 103, 2707, 110857, 6517129, 521167549, 54510591469, 7235648605909, 1190181847444189, 237953165658759679, 56905537750421669449, 16059682765076576965879, 5287171379685771887014489, 2010360123437921314268936809, 875173620070717892287441139989]

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

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