A207917 - OEIS

%I #5 Mar 31 2012 12:37:20

%S 28,784,4344,46800,366330,3327954,28188778,247024548,2129817756,

%T 18503218016,160144863388,1388528077986,12029107363320,

%U 104255340840714,903395668109660,7828846025215230,67841580292509632,587899815684673466

%N Number of nX7 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 1 0 and 1 0 1 vertically

%C Column 7 of A207918

%H R. H. Hardin, <a href="/A207917/b207917.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 21 2012