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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.

A361454 Number of 4-regular multigraphs on n unlabeled nodes with 4 external legs, loops allowed.

Table of values

n a(n)
1 1
2 4
3 17
4 78
5 360
6 1835
7 10168
8 62271
9 419701
10 3107800
11 25108419
12 219982357
13 2076785950
14 21011123423
15 226708386212
16 2598075587529
17 31509529248585
18 403155101535686
19 5426659537490872
20 76655160760249052
21 1133766220709242638
22 17522418780011531368
23 282452568669871514771
24 4740645804610572971112

List of values

[1, 4, 17, 78, 360, 1835, 10168, 62271, 419701, 3107800, 25108419, 219982357, 2076785950, 21011123423, 226708386212, 2598075587529, 31509529248585, 403155101535686, 5426659537490872, 76655160760249052, 1133766220709242638, 17522418780011531368, 282452568669871514771, 4740645804610572971112]

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

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