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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.

A198527 Number of nX7 0..4 arrays with values 0..4 introduced in row major order and each element equal to no more than two horizontal and vertical neighbors.

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%I A198527 #6 Jul 22 2025 12:59:42
%S A198527 855,47436498,3201911378187,217885196778717007,
%T A198527 14827770532074166305565,1009078065869144136137180812
%N A198527 Number of nX7 0..4 arrays with values 0..4 introduced in row major order and each element equal to no more than two horizontal and vertical neighbors.
%C A198527 Column 7 of A198528
%e A198527 Some solutions for n=4
%e A198527 ..0..0..0..1..0..0..2....0..0..0..1..0..2..3....0..0..0..1..0..2..2
%e A198527 ..1..1..0..0..2..1..3....1..1..0..0..2..4..1....1..1..0..0..2..3..0
%e A198527 ..0..0..1..0..2..3..0....0..0..1..0..2..2..1....0..0..1..0..2..1..1
%e A198527 ..0..0..1..0..0..3..4....0..0..1..0..0..0..4....0..0..1..0..0..0..3
%K A198527 nonn
%O A198527 1,1
%A A198527 _R. H. Hardin_ Oct 26 2011

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