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A203401 Number of (n+2)X(n+2) binary arrays avoiding patterns 000 and 111 in rows and columns.

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%I A203401 #7 Jul 22 2025 17:13:21
%S A203401 102,2030,60232,3858082,446672706,101578277384,43680343039806,
%T A203401 36133311325799774,57061338836892846628,172603583392706027305210
%N A203401 Number of (n+2)X(n+2) binary arrays avoiding patterns 000 and 111 in rows and columns.
%C A203401 Diagonal of A203407
%e A203401 Some solutions for n=3
%e A203401 ..1..0..1..0..0....0..1..0..1..0....1..0..0..1..0....1..0..0..1..0
%e A203401 ..1..0..0..1..0....0..0..1..0..0....0..0..1..0..0....0..1..1..0..1
%e A203401 ..0..1..1..0..1....1..1..0..1..1....1..1..0..1..1....1..0..1..0..1
%e A203401 ..1..0..1..0..0....0..0..1..0..0....0..1..1..0..0....0..1..0..1..0
%e A203401 ..0..1..0..1..0....1..0..1..1..0....0..0..1..0..1....1..0..1..1..0
%K A203401 nonn
%O A203401 1,1
%A A203401 _R. H. Hardin_ Jan 01 2012

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