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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.

A369198 Number of labeled loop-graphs with n vertices and the same number of edges as covered vertices.

Table of values

n a(n)
0 1
1 2
2 6
3 30
4 241
5 2759
6 40824
7 736342
8 15622835
9 380668095
10 10467815086
11 320529284621
12 10813165015074
13 398413594789777
14 15917197015926392
15 685312404706694574
16 31631317971844128229
17 1558017329350990780607
18 81567807853701988869120
19 4522975947689168088308305

List of values

[1, 2, 6, 30, 241, 2759, 40824, 736342, 15622835, 380668095, 10467815086, 320529284621, 10813165015074, 398413594789777, 15917197015926392, 685312404706694574, 31631317971844128229, 1558017329350990780607, 81567807853701988869120, 4522975947689168088308305]

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

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