A185887 - OEIS

%I #5 Mar 31 2012 12:36:04

%S 6195480,3246601822,1859643383374,1060306245936410,601942558514445972,

%T 341943649302595064930,194280290689274140633844,

%U 110380142237960121367785334,62713144775703640933821912808

%N 1/729 the number of (n+2)X7 0..2 arrays with no 3X3 subblock trace equal to any horizontal or vertical neighbor 3X3 subblock trace

%C Column 5 of A185891

%H R. H. Hardin, <a href="/A185887/b185887.txt">Table of n, a(n) for n = 1..39</a>

%e Some solutions for 4X7

%e ..0..0..0..0..0..2..0....0..0..0..2..1..1..2....0..0..0..1..0..1..0

%e ..0..0..0..0..1..1..1....0..0..0..0..2..1..1....0..0..0..0..1..2..2

%e ..0..0..0..1..0..2..1....0..0..0..1..2..2..2....0..0..0..1..0..0..2

%e ..0..0..1..0..0..0..2....0..0..1..0..0..0..2....0..0..1..0..0..0..2

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 05 2011