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.

A289158 Number of unlabeled connected loopless multigraphs with n nodes of degree 4 or less and with at most double edges.

Table of values

n a(n)
0 1
1 1
2 2
3 7
4 28
5 112
6 590
7 3419
8 23453
9 178599
10 1516692
11 14083855
12 142029043
13 1542152723
14 17925912574
15 221938298129
16 2914638247016
17 40455853460661
18 591654481313077
19 9091698010380468
20 146433114305147508
21 2466517505722469501
22 43361349681960337334

List of values

[1, 1, 2, 7, 28, 112, 590, 3419, 23453, 178599, 1516692, 14083855, 142029043, 1542152723, 17925912574, 221938298129, 2914638247016, 40455853460661, 591654481313077, 9091698010380468, 146433114305147508, 2466517505722469501, 43361349681960337334]

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

Content is available under The OEIS End-User License Agreement.