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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.

A219005 Unmatched value maps: number of 4Xn binary arrays indicating the locations of corresponding elements not equal to any horizontal, diagonal or antidiagonal neighbor in a random 0..2 4Xn array.

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%I A219005 #5 Jul 24 2025 19:40:09
%S A219005 1,126,2374,31857,462668,7027671,105807897,1583929029,23732266546,
%T A219005 355842741628,5335066750849
%N A219005 Unmatched value maps: number of 4Xn binary arrays indicating the locations of corresponding elements not equal to any horizontal, diagonal or antidiagonal neighbor in a random 0..2 4Xn array.
%C A219005 Row 4 of A219002
%e A219005 Some solutions for n=3
%e A219005 ..1..1..1....1..0..0....0..1..0....1..1..1....1..0..1....1..0..0....0..0..1
%e A219005 ..0..0..1....1..0..1....0..0..0....1..0..0....0..0..0....0..0..1....1..0..0
%e A219005 ..1..0..0....1..1..1....1..0..1....1..1..1....1..0..0....1..0..0....0..0..0
%e A219005 ..1..0..1....0..0..1....1..0..0....0..0..0....1..1..0....1..0..1....1..0..1
%K A219005 nonn
%O A219005 1,2
%A A219005 _R. H. Hardin_ Nov 09 2012

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