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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.

A198761 Number of hopping sequences in four-colored rooted trees with n nodes, starting and ending with the same "initial state" from all of the (two-colored) rooted trees in A198760. See comments.

Table of values

n a(n)
2 2
3 20
4 648
5 45472
6 5644880
7 1099056000
8 310007943616
9 119777421416192

List of values

[2, 20, 648, 45472, 5644880, 1099056000, 310007943616, 119777421416192]

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

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