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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.

A006023 Number of unlabeled mating digraphs with n nodes.

Table of values

n a(n)
0 1
1 1
2 2
3 12
4 183
5 8884
6 1495984
7 872987584
8 1787227218134
9 13013640978954744
10 341143259362180445672
11 32519497484526664873838560
12 11366387701006542223325518765872
13 14668949294272099348849331250968826816

List of values

[1, 1, 2, 12, 183, 8884, 1495984, 872987584, 1787227218134, 13013640978954744, 341143259362180445672, 32519497484526664873838560, 11366387701006542223325518765872, 14668949294272099348849331250968826816]

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

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