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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.

A054916 Number of connected unlabeled regular graphs with n nodes such that complement is also connected.

Table of values

n a(n)
1 1
2 0
3 0
4 0
5 1
6 2
7 2
8 12
9 18
10 158
11 532
12 18956
13 389418
14 50314722
15 2942198334
16 1698517035792
17 442786966113484
18 649978211591577760
19 429712868499646362046
20 2886054228478618206288948
21 8835589045148342277740379344
22 152929279364927228928017067050204
23 1207932509391069805495173186013097090
24 99162609848561525198669168626676490270856

List of values

[1, 0, 0, 0, 1, 2, 2, 12, 18, 158, 532, 18956, 389418, 50314722, 2942198334, 1698517035792, 442786966113484, 649978211591577760, 429712868499646362046, 2886054228478618206288948, 8835589045148342277740379344, 152929279364927228928017067050204, 1207932509391069805495173186013097090, 99162609848561525198669168626676490270856]

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

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