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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.

A370318 Number of labeled simple graphs with n vertices and the same number of edges as covered vertices, such that the edge set is connected.

Table of values

n a(n)
0 0
1 0
2 0
3 1
4 19
5 307
6 5237
7 99137
8 2098946
9 49504458
10 1291570014
11 37002273654
12 1156078150969
13 39147186978685
14 1428799530304243
15 55933568895261791
16 2338378885159906196
17 103995520598384132516
18 4903038902046860966220
19 244294315694676224001852
20 12827355456239840407125363

List of values

[0, 0, 0, 1, 19, 307, 5237, 99137, 2098946, 49504458, 1291570014, 37002273654, 1156078150969, 39147186978685, 1428799530304243, 55933568895261791, 2338378885159906196, 103995520598384132516, 4903038902046860966220, 244294315694676224001852, 12827355456239840407125363]

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

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