cp's OEIS Frontend

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.

A225823 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. Compared to A198761, only one node color of the initial states is mobile on the tree (Falicov-Kimball model).

Table of values

n a(n)
2 1
3 4
4 54
5 1568
6 80680
7 6510624
8 761286848
9 121944722176
10 25668462562560

List of values

[1, 4, 54, 1568, 80680, 6510624, 761286848, 121944722176, 25668462562560]

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

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