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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.

A324740 Number of simple graphs on n unlabeled nodes with maximum degree exactly 2.

Table of values

n a(n)
1 0
2 0
3 2
4 4
5 8
6 15
7 25
8 41
9 65
10 100
11 150
12 225
13 327
14 474
15 678
16 962
17 1348
18 1884
19 2602
20 3581
21 4889
22 6644
23 8968
24 12064
25 16124
26 21476
27 28462
28 37585
29 49407
30 64747
31 84495
32 109936
33 142522
34 184226
35 237350
36 304977
37 390669
38 499169
39 636039
40 808468
41 1024996
42 1296573
43 1636151

List of values

[0, 0, 2, 4, 8, 15, 25, 41, 65, 100, 150, 225, 327, 474, 678, 962, 1348, 1884, 2602, 3581, 4889, 6644, 8968, 12064, 16124, 21476, 28462, 37585, 49407, 64747, 84495, 109936, 142522, 184226, 237350, 304977, 390669, 499169, 636039, 808468, 1024996, 1296573, 1636151]

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

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