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%I #8 Jun 26 2022 12:56:10
%S 2,16,90,784,5856,42849,353808,2792241,21195317,182223001,1372615690,
%T 11550015841,91115397450,745461286801,5965914998428,49005684164836,
%U 389634565985060,3219980044337424
%N Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 0 1 1 vertically.
%C Diagonal of A207368.
%e Some solutions for n=4
%e ..1..1..1..1....1..0..1..0....0..1..0..1....1..1..0..1....1..1..0..1
%e ..0..0..1..0....0..0..1..0....0..1..0..0....1..0..0..1....0..0..1..0
%e ..0..0..1..0....0..0..1..0....0..1..0..0....0..1..0..0....0..1..0..1
%e ..0..0..1..0....0..0..1..0....0..1..0..0....1..0..0..1....0..0..1..0
%Y Cf. A207368.
%K nonn
%O 1,1
%A _R. H. Hardin_, Feb 17 2012
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