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%I #7 Dec 18 2015 18:18:01
%S 2,16,102,1004,14253,237576,5715255,163471950,6200122170,294261603282,
%T 17977383927693,1375335087129521,138833395825965196,
%U 17233401412131428885,2924391663494366576782,600552802391087361313757
%N Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 0 0 vertically
%C Diagonal of A207500
%H R. H. Hardin, <a href="/A207494/b207494.txt">Table of n, a(n) for n = 1..18</a>
%e Some solutions for n=4
%e ..1..1..0..1....0..0..1..0....1..1..0..1....0..1..0..0....1..1..0..1
%e ..0..1..0..0....1..1..1..1....1..1..0..1....0..0..1..0....0..0..1..0
%e ..1..1..0..1....0..0..1..0....0..1..0..0....0..1..0..0....1..1..1..1
%e ..0..1..0..1....1..1..0..1....1..0..0..1....0..0..1..0....1..0..1..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 18 2012
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