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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.

A327079 Number of labeled simple connected graphs covering n vertices with at least one bridge that is not an endpoint/leaf (non-spanning edge-connectivity 1).

Table of values

n a(n)
0 0
1 0
2 1
3 0
4 12
5 180
6 4200
7 157920
8 9673664
9 1011129840
10 190600639200
11 67674822473280
12 46325637863907072
13 61746583700640860736
14 161051184122415878112640
15 824849999242893693424992000
16 8317799170120961768715123118080

List of values

[0, 0, 1, 0, 12, 180, 4200, 157920, 9673664, 1011129840, 190600639200, 67674822473280, 46325637863907072, 61746583700640860736, 161051184122415878112640, 824849999242893693424992000, 8317799170120961768715123118080]

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

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