%I #5 Mar 31 2012 12:35:54
%S 1,162,163208,1042063656,41531687999736,10425296660739253420
%N 1/81 the number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor
%C Diagonal of A183819
%e Some solutions with upper left block zero for 3X3
%e ..0..0..2....0..0..0....0..0..2....0..0..0....0..0..2....0..0..0....0..0..0
%e ..0..0..0....0..0..1....0..0..1....0..0..2....0..0..2....0..0..1....0..0..1
%e ..2..2..0....0..1..2....1..1..1....1..1..1....1..2..1....2..0..1....1..2..1
%K nonn
%O 1,2
%A _R. H. Hardin_ Jan 07 2011
