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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.

A140636 Number of connected graphs on n unlabeled nodes that contain at least two cycles.

Table of values

n a(n)
1 0
2 0
3 0
4 2
5 13
6 93
7 809
8 11005
9 260793
10 11715808
11 1006698524
12 164059824899
13 50335907853919
14 29003487462805642
15 31397381142761123838
16 63969560113225175845492
17 245871831682084026518599099
18 1787331725248899088890197955308
19 24636021429399867655322650752269938

List of values

[0, 0, 0, 2, 13, 93, 809, 11005, 260793, 11715808, 1006698524, 164059824899, 50335907853919, 29003487462805642, 31397381142761123838, 63969560113225175845492, 245871831682084026518599099, 1787331725248899088890197955308, 24636021429399867655322650752269938]

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

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