cp's OEIS Frontend

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.

A004104 Number of self-dual signed graphs with n nodes. Also number of self-complementary 2-multigraphs on n nodes.

Table of values

n a(n)
1 1
2 1
3 2
4 6
5 20
6 86
7 662
8 8120
9 171526
10 5909259
11 348089533
12 33883250874
13 5476590066777
14 1490141905609371
15 666003784522738152
16 509204473666338077658
17 636051958071749028811326
18 1375164117171886868027357906
19 4844133410739656724629165903483
20 29777568550007746192195431057341474

List of values

[1, 1, 2, 6, 20, 86, 662, 8120, 171526, 5909259, 348089533, 33883250874, 5476590066777, 1490141905609371, 666003784522738152, 509204473666338077658, 636051958071749028811326, 1375164117171886868027357906, 4844133410739656724629165903483, 29777568550007746192195431057341474]

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

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