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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.

A289990 Number of unlabeled connected simple graphs with n nodes of degree 4 or less and degree at least 2 which are not 4-regular graphs.

Table of values

n a(n)
1 0
2 0
3 1
4 3
5 10
6 37
7 161
8 878
9 5605
10 41912
11 355558
12 3359250
13 34723752
14 388248880
15 4655392910
16 59493136018
17 806368182523
18 11546555440892
19 174096392201350
20 2756178999408121
21 45700016438834847
22 791855740761714317
23 14309459324411915139
24 269188219981362999139

List of values

[0, 0, 1, 3, 10, 37, 161, 878, 5605, 41912, 355558, 3359250, 34723752, 388248880, 4655392910, 59493136018, 806368182523, 11546555440892, 174096392201350, 2756178999408121, 45700016438834847, 791855740761714317, 14309459324411915139, 269188219981362999139]

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

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