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%I #7 Dec 18 2015 18:18:04
%S 2,16,60,196,900,5476,38232,287296,3132576,37625956,515992736,
%T 9773299600,197179936872,5340055452736,166631085360000,
%U 6057724646680996,305548384194976300,15689243192533764624,1137621414073872082528
%N Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 0 and 1 1 1 vertically
%C Diagonal of A209224
%H R. H. Hardin, <a href="/A209219/b209219.txt">Table of n, a(n) for n = 1..21</a>
%e Some solutions for n=4
%e ..0..0..1..1....0..1..1..0....1..1..0..1....1..0..0..1....1..1..0..0
%e ..1..1..0..0....0..1..1..0....0..1..1..0....0..1..1..0....0..1..1..1
%e ..1..1..1..0....1..0..0..1....1..0..1..1....1..1..1..1....1..0..1..1
%e ..0..0..1..1....1..1..0..1....1..1..0..1....1..0..0..1....1..1..0..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 06 2012
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