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%I #9 May 07 2021 13:33:55
%S 2,16,90,1089,10080,150544,1913940,33930625,544003170,11177987076,
%T 215177010048,5033386477441,112708053008152,2958949185458176,
%U 75387859827570360,2195709810260687361,62623865365172370000
%N Number of n X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 0 1 1 vertically.
%C Diagonal of A208555.
%H R. H. Hardin, <a href="/A208550/b208550.txt">Table of n, a(n) for n = 1..38</a>
%e Some solutions for n=4
%e ..1..0..1..0....0..1..1..0....0..1..1..1....0..1..0..0....1..0..1..1
%e ..0..1..1..1....0..1..1..0....0..1..0..1....1..0..1..1....0..1..1..0
%e ..1..0..1..0....0..1..0..0....0..1..1..0....0..1..0..0....1..0..1..1
%e ..0..1..0..1....0..1..1..0....0..1..0..0....1..0..1..1....0..1..1..0
%Y Cf. A208555.
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 28 2012
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