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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.

A322698 Number of regular graphs with half-edges on n labeled vertices.

Table of values

n a(n)
0 1
1 2
2 4
3 10
4 40
5 278
6 3554
7 84590
8 3776280
9 317806466
10 50710452574
11 15414839551538
12 8964708979273634
13 10008446308186072290
14 21518891146915893435358
15 89320970210116481106835986
16 717558285660687970023516336792
17 11176382741327158622885664697124082
18 338202509574712032788035618665293979610

List of values

[1, 2, 4, 10, 40, 278, 3554, 84590, 3776280, 317806466, 50710452574, 15414839551538, 8964708979273634, 10008446308186072290, 21518891146915893435358, 89320970210116481106835986, 717558285660687970023516336792, 11176382741327158622885664697124082, 338202509574712032788035618665293979610]

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

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