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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.

A183363 Number of n X n binary arrays with no element equal to the sum mod 3 of its horizontal and vertical neighbors.

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%I A183363 #8 Jul 22 2025 08:52:03
%S A183363 1,3,18,138,3102,137688,12617557,2402945556,936460285557,
%T A183363 739951660291721
%N A183363 Number of n X n binary arrays with no element equal to the sum mod 3 of its horizontal and vertical neighbors.
%C A183363 Diagonal of A183368
%e A183363 Some solutions for 5X5
%e A183363 ..1..0..0..1..1....1..1..1..0..0....1..1..1..1..0....1..1..0..0..1
%e A183363 ..0..0..1..1..1....1..0..1..0..1....1..0..0..1..0....1..1..1..0..0
%e A183363 ..1..0..1..0..1....1..1..1..0..0....1..0..0..1..1....1..0..1..1..1
%e A183363 ..0..0..1..1..1....0..0..1..1..1....1..1..1..1..1....1..1..0..1..1
%e A183363 ..1..0..1..1..1....1..0..1..1..1....1..1..0..0..0....0..1..1..1..0
%K A183363 nonn
%O A183363 1,2
%A A183363 _R. H. Hardin_ Jan 04 2011

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