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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.

A143900 Number of simple graphs on n labeled nodes containing at least one cycle subgraph, also row sums of A143899.

Table of values

n a(n)
0 0
1 0
2 0
3 1
4 26
5 733
6 29836
7 2060191
8 267873508
9 68709450231
10 35184166480296
11 36028792251523289
12 73786976171465003256
13 302231454900131663566437
14 2475880078570650265515241808
15 40564819207303337099536803011071
16 1329227995784915872766249150185503728

List of values

[0, 0, 0, 1, 26, 733, 29836, 2060191, 267873508, 68709450231, 35184166480296, 36028792251523289, 73786976171465003256, 302231454900131663566437, 2475880078570650265515241808, 40564819207303337099536803011071, 1329227995784915872766249150185503728]

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

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