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%I #5 Mar 31 2012 12:37:33
%S 0,4125,58464712,7415631633670,11219641807667569855,
%T 214148948714201593922295166,51994819539384403072547129110683133,
%U 160715710349516432110880775618321863607017118
%N Number of (n+1)X(n+1) 0..3 arrays containing all values 0..3 with every 2X2 subblock having two or three distinct values, and new values 0..3 introduced in row major order
%C Diagonal of A210320
%e Some solutions for n=4
%e ..0..0..0..0..0....0..0..1..2..0....0..0..0..0..1....0..0..0..1..1
%e ..1..1..1..0..1....2..2..1..2..0....0..1..2..2..0....1..1..2..2..3
%e ..0..2..0..0..2....0..1..0..2..2....2..0..0..0..1....0..3..3..0..0
%e ..1..1..0..1..0....0..1..3..2..0....2..3..2..3..1....3..3..0..2..1
%e ..0..1..0..3..3....0..0..0..2..0....1..1..3..3..3....0..1..0..1..1
%K nonn
%O 1,2
%A _R. H. Hardin_ Mar 20 2012
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