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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.

A020555 Number of multigraphs on n labeled edges (with loops). Also number of genetically distinct states amongst n individuals.

Table of values

n a(n)
0 1
1 2
2 9
3 66
4 712
5 10457
6 198091
7 4659138
8 132315780
9 4441561814
10 173290498279
11 7751828612725
12 393110572846777
13 22385579339430539
14 1419799938299929267
15 99593312799819072788
16 7678949893962472351181
17 647265784993486603555551
18 59357523410046023899154274

List of values

[1, 2, 9, 66, 712, 10457, 198091, 4659138, 132315780, 4441561814, 173290498279, 7751828612725, 393110572846777, 22385579339430539, 1419799938299929267, 99593312799819072788, 7678949893962472351181, 647265784993486603555551, 59357523410046023899154274]

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

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