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.

A221854 Number of 3Xn arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, without consecutive moves in the same direction.

Table of values

n a(n)
1 1
2 306
3 10085
4 465305
5 19159028
6 811781250
7 34109464173
8 1436352539452
9 60446151885851
10 2544184795092968

List of values

[1, 306, 10085, 465305, 19159028, 811781250, 34109464173, 1436352539452, 60446151885851, 2544184795092968]

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

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