%I #7 Dec 18 2015 18:18:02

%S 2,16,78,361,6235,261121,4747545,90782784,18473477832,9693564675601,

%T 668167531935849,46925086118316121,128627682135940435023,

%U 919037094400530117376144,213624920267877921384329046

%N Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 1 and 1 1 0 vertically

%C Diagonal of A208108

%H R. H. Hardin, <a href="/A208102/b208102.txt">Table of n, a(n) for n = 1..23</a>

%e Some solutions for n=5

%e ..0..1..1..0..0....1..0..0..1..1....1..0..1..1..1....1..1..1..1..1

%e ..0..1..1..0..1....0..1..1..0..0....0..0..1..1..1....0..0..1..1..1

%e ..0..1..1..1..0....1..0..0..1..1....1..0..1..1..1....1..0..1..1..1

%e ..1..1..1..0..1....0..1..1..0..0....0..0..1..1..1....0..1..1..1..1

%e ..0..1..1..1..0....1..0..0..1..1....0..0..1..1..1....0..0..1..1..1

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 23 2012