%I #5 Mar 31 2012 12:37:31
%S 0,119,20871,8989701,11175987745,42412428208163,503253512833068071,
%T 18932450647021933023425,2277047483224817482244026729,
%U 880611215077918756189911925544659
%N Number of (n+1)X(n+1) 0..2 arrays containing all values 0..2 with every 2X2 subblock having two distinct values, and new values 0..2 introduced in row major order
%C Diagonal of A210052
%e Some solutions for n=4
%e ..0..1..1..2..2....0..1..1..2..0....0..1..1..2..1....0..0..0..0..1
%e ..1..0..1..1..2....1..0..1..2..2....1..0..1..1..1....0..1..0..1..0
%e ..1..1..0..1..2....0..0..1..2..0....0..1..0..0..1....0..0..0..0..1
%e ..0..1..1..1..2....0..1..1..2..2....0..1..0..1..1....1..1..0..1..0
%e ..0..1..2..2..2....0..0..1..1..2....1..1..0..0..1....2..1..0..1..1
%K nonn
%O 1,2
%A _R. H. Hardin_ Mar 16 2012