A183809 - OEIS

%I #5 Mar 31 2012 12:35:54

%S 729,18567,418925,10494847,249227639,6153770375,148654946039,

%T 3645190453457,88602958444787,2166253373649057,52777731056211077,

%U 1288799761305039781,31427943533967865959,767074334899635021939

%N 1/16 the number of (n+1)X8 binary arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor

%C Column 7 of A183811

%H R. H. Hardin, <a href="/A183809/b183809.txt">Table of n, a(n) for n = 1..60</a>

%e Some solutions with upper left block zero for 3X8

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 07 2011