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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.

A183595 1/6 the number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock containing all three values.

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%I A183595 #7 Jul 22 2025 09:07:37
%S A183595 6,204,17174,3831324,2220901926,3366668183708,13330538464876654,
%T A183595 137936054886331468840,3729575155642883493035294
%N A183595 1/6 the number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock containing all three values.
%C A183595 Diagonal of A183603
%e A183595 Some solutions with a(1,1)=0 for 3X3
%e A183595 ..0..0..0....0..2..1....0..1..0....0..2..0....0..2..0....0..2..0....0..0..1
%e A183595 ..1..2..1....2..1..0....2..0..2....1..0..1....1..1..1....2..1..2....1..2..1
%e A183595 ..0..0..0....0..1..2....1..1..1....2..2..1....2..0..2....1..0..2....2..0..2
%K A183595 nonn
%O A183595 1,1
%A A183595 _R. H. Hardin_ Jan 05 2011

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