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%I #7 Dec 18 2015 18:18:03
%S 2,16,102,1269,18395,365094,8948825,295643872,11569038318,
%T 627185978622,39743547264799,3541122637275087,367535911624122068,
%U 55280614681310159979,9428817551220326025746,2476044134980962346444356
%N Number of n X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 0 1 1 vertically
%C Diagonal of A208420
%H R. H. Hardin, <a href="/A208415/b208415.txt">Table of n, a(n) for n = 1..22</a>
%e Some solutions for n=4
%e ..0..1..1..0....0..1..1..0....1..1..0..0....1..0..1..0....1..1..0..0
%e ..0..1..1..1....0..1..0..1....1..0..1..0....0..1..1..1....1..1..1..0
%e ..1..1..0..0....1..0..1..0....1..1..0..1....1..0..1..0....0..1..0..1
%e ..0..1..0..1....0..1..0..1....1..0..1..0....0..1..0..1....1..1..1..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 26 2012
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