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

%S 27,28086,151319356,4223442979220,601942558514445972,

%T 440856600893036211079732

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

%C Diagonal of A185891

%e Some solutions for 4X4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 05 2011