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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.

A228694 Number of labeled graphs on 2n nodes with degree set {1,3}, with multiple edges and loops allowed.

Table of values

n a(n)
0 1
1 5
2 186
3 22960
4 6831650
5 4071581010
6 4297593045900
7 7359945086654160
8 19160998099781838300
9 72124861521922576867500
10 377272837054974521764903800
11 2655805439512625993259947280000
12 24502785480337947107875310460499800
13 289788471352423824164622588783247815000

List of values

[1, 5, 186, 22960, 6831650, 4071581010, 4297593045900, 7359945086654160, 19160998099781838300, 72124861521922576867500, 377272837054974521764903800, 2655805439512625993259947280000, 24502785480337947107875310460499800, 289788471352423824164622588783247815000]

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

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