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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.

A215764 Number of undirected labeled graphs on n nodes with exactly 4 cycle graphs as connected components.

Table of values

n a(n)
4 1
5 10
6 65
7 420
8 3157
9 27342
10 264925
11 2831455
12 33077539
13 419262987
14 5730379473
15 84009491475
16 1315019717433
17 21890336017248
18 386143234692768
19 7195289865439824
20 141228388872794736
21 2912462945497687680
22 62959048637195335680
23 1423638554827333204800

List of values

[1, 10, 65, 420, 3157, 27342, 264925, 2831455, 33077539, 419262987, 5730379473, 84009491475, 1315019717433, 21890336017248, 386143234692768, 7195289865439824, 141228388872794736, 2912462945497687680, 62959048637195335680, 1423638554827333204800]

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

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