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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.

A054479 Number of sets of cycle graphs of 2n nodes where the 2-colored edges alternate colors.

Table of values

n a(n)
0 1
1 0
2 6
3 120
4 6300
5 514080
6 62785800
7 10676746080
8 2413521910800
9 700039083744000
10 253445583029839200
11 112033456760809584000
12 59382041886244720843200
13 37175286835046004765120000
14 27139206193305890195912400000
15 22852066417535931447551359680000

List of values

[1, 0, 6, 120, 6300, 514080, 62785800, 10676746080, 2413521910800, 700039083744000, 253445583029839200, 112033456760809584000, 59382041886244720843200, 37175286835046004765120000, 27139206193305890195912400000, 22852066417535931447551359680000]

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

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