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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
0

%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