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%I #7 Dec 18 2015 18:18:01
%S 2,16,102,729,4212,26896,154580,970225,5697150,36000000,216023850,
%T 1377968641,8411571224,54080432704,334469528520,2163643890489,
%U 13517662791690,87865126849600,553380551724110,3610810383420361
%N Number of n X n 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 1 0 vertically
%C Diagonal of A207403
%H R. H. Hardin, <a href="/A207398/b207398.txt">Table of n, a(n) for n = 1..27</a>
%e Some solutions for n=4
%e ..0..0..0..0....1..0..0..0....1..1..0..1....1..0..0..0....1..0..1..0
%e ..1..0..1..0....0..1..0..0....1..1..0..1....0..1..0..0....1..1..0..0
%e ..0..0..0..0....0..1..0..0....1..1..0..1....1..0..0..0....1..1..1..0
%e ..0..0..0..0....0..1..0..0....1..1..0..1....1..1..0..0....1..1..1..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 17 2012
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