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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.

A157051 Number of connected unlabeled non-bipartite graphs on n nodes.

Table of values

n a(n)
0 0
1 0
2 0
3 1
4 3
5 16
6 95
7 809
8 10935
9 260350
10 11712539
11 1006674967
12 164059617696
13 50335905627489
14 29003487431654737
15 31397381142185989848
16 63969560113210957966315
17 245871831682083553779103249
18 1787331725248899067681312999794
19 24636021429399867654036551645873645
20 645465483198722799426625560872826564232

List of values

[0, 0, 0, 1, 3, 16, 95, 809, 10935, 260350, 11712539, 1006674967, 164059617696, 50335905627489, 29003487431654737, 31397381142185989848, 63969560113210957966315, 245871831682083553779103249, 1787331725248899067681312999794, 24636021429399867654036551645873645, 645465483198722799426625560872826564232]

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

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