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%I #5 Mar 31 2012 12:37:31
%S 1,2384,7853122,198214365329,41562565414532492,
%T 72599208478326114502304,1056388250136945583891331683046,
%U 128049790734830830744725613641587707522
%N Number of (n+1)X(n+1) 0..3 arrays containing all values 0..3 with every 2X2 subblock having one, three or four distinct values, and new values 0..3 introduced in row major order
%C Diagonal of A210086
%e Some solutions for n=4
%e ..0..1..0..0..0....0..1..0..2..0....0..1..0..0..1....0..1..0..0..0
%e ..2..3..0..0..0....3..3..0..1..3....1..2..1..2..2....0..2..1..3..2
%e ..2..0..2..3..1....2..1..1..2..1....3..0..3..3..0....1..1..3..0..3
%e ..0..1..0..3..2....1..0..2..0..3....0..1..3..3..2....2..3..0..1..0
%e ..0..2..3..2..0....0..2..3..1..1....1..2..1..0..1....2..1..3..2..0
%K nonn
%O 1,2
%A _R. H. Hardin_ Mar 17 2012