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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.

A185539 1/6 the number of nX6 0..5 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.

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%I A185539 #8 Jul 22 2025 09:53:49
%S A185539 41,127190,167398110,295044602325,468362874353295
%N A185539 1/6 the number of nX6 0..5 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.
%C A185539 Column 6 of A185540
%e A185539 Some solutions for 3X6 with a(1,1)=0
%e A185539 ..0..0..3..4..2..2....0..0..2..2..2..4....0..0..3..1..0..0....0..0..3..5..3..3
%e A185539 ..0..3..3..4..4..2....0..3..3..1..2..4....0..3..3..1..3..4....0..3..3..5..2..3
%e A185539 ..0..0..0..2..2..2....0..0..0..1..2..2....0..0..0..3..3..4....0..0..0..5..2..2
%K A185539 nonn
%O A185539 1,1
%A A185539 _R. H. Hardin_ Jan 30 2011

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