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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.

A361698 The number of unlabeled connected 4 regular multigraphs on n nodes with 4 external legs, loops allowed.

Table of values

n a(n)
0 1
1 1
2 2
3 8
4 37
5 181
6 1010
7 6135
8 40893
9 295753
10 2317683
11 19568427
12 177397551
13 1719790643
14 17767328745
15 194954224643
16 2265042428226
17 27785727158182
18 358952560098959
19 4871697965709175
20 69309502018430799
21 1031550920679805502
22 16030923441853969843
23 259682356008358417321
24 4377679648827121988375

List of values

[1, 1, 2, 8, 37, 181, 1010, 6135, 40893, 295753, 2317683, 19568427, 177397551, 1719790643, 17767328745, 194954224643, 2265042428226, 27785727158182, 358952560098959, 4871697965709175, 69309502018430799, 1031550920679805502, 16030923441853969843, 259682356008358417321, 4377679648827121988375]

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

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