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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.

A239998 Number of nX5 0..3 arrays with no element equal to one plus the sum of elements to its left or two plus the sum of elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4.

Table of values

n a(n)
1 6
2 65
3 1262
4 27415
5 635873
6 15981219
7 429788876
8 12392346376
9 378942837634
10 12142601105289
11 402528634881777
12 13658205122550505
13 470581987400700236
14 16373110177063830815
15 573193391287239428978
16 20143454978776804982736

List of values

[6, 65, 1262, 27415, 635873, 15981219, 429788876, 12392346376, 378942837634, 12142601105289, 402528634881777, 13658205122550505, 470581987400700236, 16373110177063830815, 573193391287239428978, 20143454978776804982736]

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

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