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.

A221730 Number of 4 X n arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, with every occupancy equal to zero or two.

Table of values

n a(n)
1 0
2 44
3 464
4 6188
5 80160
6 1048566
7 13757056
8 180437354
9 2363318964
10 30930073844
11 404584067882
12 5290050421396

List of values

[0, 44, 464, 6188, 80160, 1048566, 13757056, 180437354, 2363318964, 30930073844, 404584067882, 5290050421396]

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

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