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.

A352761 Number of partial order relations on [n] such that 1 and 2 are in the same connected component.

Table of values

n a(n)
2 2
3 14
4 176
5 3644
6 117860
7 5755964
8 414823916
9 43390462724
10 6502296995300
11 1380924739533644
12 411744185101611356
13 170949139294419110804
14 98118349844314838731220
15 77360523694460582654188124
16 83319557470828626639253920716
17 121980734453060653381753104078884
18 241689591664023311258411470178766020

List of values

[2, 14, 176, 3644, 117860, 5755964, 414823916, 43390462724, 6502296995300, 1380924739533644, 411744185101611356, 170949139294419110804, 98118349844314838731220, 77360523694460582654188124, 83319557470828626639253920716, 121980734453060653381753104078884, 241689591664023311258411470178766020]

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

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