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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.

A183524 Number of nX7 0..2 arrays with each element equal to either the sum mod 3 of its horizontal and vertical neighbors or the sum mod 3 of its diagonal and antidiagonal neighbors.

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%I A183524 #6 Jul 22 2025 09:03:53
%S A183524 37,2803,47685,1521573,56562977,1908431611
%N A183524 Number of nX7 0..2 arrays with each element equal to either the sum mod 3 of its horizontal and vertical neighbors or the sum mod 3 of its diagonal and antidiagonal neighbors.
%C A183524 Column 7 of A183526
%e A183524 Some solutions for 3X7
%e A183524 ..0..2..1..1..2..1..1....2..0..2..1..0..2..2....2..0..2..1..0..2..0
%e A183524 ..1..0..1..1..2..1..0....2..0..1..0..0..0..0....2..0..1..0..0..0..2
%e A183524 ..0..2..2..2..2..1..1....0..0..2..1..0..1..1....1..2..1..1..0..0..0
%K A183524 nonn
%O A183524 1,1
%A A183524 _R. H. Hardin_ Jan 05 2011

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