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%I #7 Dec 18 2015 18:18:02
%S 2,16,108,900,6300,50176,352800,2722500,19111950,144288144,1010017008,
%T 7505103424,52382558592,384598425600,2677165603200,19473033306276,
%U 135229397960250,976281270250000,6765629202832500,48545357372612100
%N Number of n X n 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 0 1 vertically
%C Diagonal of A208142
%H R. H. Hardin, <a href="/A208137/b208137.txt">Table of n, a(n) for n = 1..70</a>
%e Some solutions for n=4
%e ..1..1..1..1....0..0..0..0....1..0..0..0....0..0..0..0....1..1..0..1
%e ..1..1..1..1....1..0..1..0....0..1..0..0....0..1..0..0....1..1..0..1
%e ..1..1..1..1....0..0..0..0....0..1..0..0....0..0..0..0....0..1..0..0
%e ..1..1..1..1....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 23 2012
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