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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.

A369202 Number of unlabeled simple graphs covering n vertices such that it is not possible to choose a different vertex from each edge (non-choosable).

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 2
5 13
6 95
7 826
8 11137
9 261899
10 11729360
11 1006989636
12 164072166301
13 50336940172142
14 29003653625802754
15 31397431814146891910
16 63969589218557753075156
17 245871863137828405124380563
18 1787331789281458167615190373076
19 24636021675399858912682459601585276

List of values

[0, 0, 0, 0, 2, 13, 95, 826, 11137, 261899, 11729360, 1006989636, 164072166301, 50336940172142, 29003653625802754, 31397431814146891910, 63969589218557753075156, 245871863137828405124380563, 1787331789281458167615190373076, 24636021675399858912682459601585276]

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

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