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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.

A208002 Number of n X n 0..1 arrays avoiding 0 0 1 and 1 0 0 horizontally and 0 1 1 and 1 1 0 vertically.

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%I A208002 #8 Jul 22 2025 21:05:39
%S A208002 2,16,92,536,7016,90232,3569728,101519408,13171648732,783070626724,
%T A208002 349693561626416,41247666769702640,65777806787688875844,
%U A208002 14782056897493046845072,86537979599825962734398012
%N A208002 Number of n X n 0..1 arrays avoiding 0 0 1 and 1 0 0 horizontally and 0 1 1 and 1 1 0 vertically.
%C A208002 Diagonal of A208007
%e A208002 Some solutions for n=4
%e A208002 ..1..0..1..0....1..1..1..0....1..1..1..1....0..0..0..0....1..0..1..0
%e A208002 ..1..0..1..1....1..0..1..1....0..1..1..1....0..1..1..0....1..1..1..0
%e A208002 ..1..0..1..0....1..1..1..0....0..1..1..1....0..0..0..0....1..0..1..1
%e A208002 ..1..0..1..0....1..0..1..1....0..1..1..1....0..1..1..0....1..1..1..0
%K A208002 nonn
%O A208002 1,1
%A A208002 _R. H. Hardin_ Feb 22 2012

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