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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.

A222141 Number of nX5 0..4 arrays with no entry increasing mod 5 by 4 rightwards or downwards, starting with upper left zero.

Table of values

n a(n)
1 256
2 114244
3 50999956
4 22767656980
5 10164078082036
6 4537511642094436
7 2025664524518719732
8 904309916809657591444
9 403707729455406641892052
10 180225747607432250658675940
11 80457513519867024627155058004

List of values

[256, 114244, 50999956, 22767656980, 10164078082036, 4537511642094436, 2025664524518719732, 904309916809657591444, 403707729455406641892052, 180225747607432250658675940, 80457513519867024627155058004]

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

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