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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.

A303031 Number of unlabeled connected loopless multigraphs with n nodes of degree 5 or less and with single or double edges.

Table of values

n a(n)
0 1
1 1
2 2
3 7
4 43
5 282
6 2708
7 31175
8 451701
9 7731154
10 154264825
11 3515514725
12 90381251065
13 2594105950453
14 82437061616923
15 2880328250160638
16 109987239823116870
17 4566153786442575091
18 205144850920195457266
19 9933105076082553631262
20 516439104253062357469829

List of values

[1, 1, 2, 7, 43, 282, 2708, 31175, 451701, 7731154, 154264825, 3515514725, 90381251065, 2594105950453, 82437061616923, 2880328250160638, 109987239823116870, 4566153786442575091, 205144850920195457266, 9933105076082553631262, 516439104253062357469829]

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

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