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%I #5 Mar 31 2012 12:36:01
%S 64,8272,1967440,4975179472,22101775999696,1004331937875999952,
%T 83362210743024650511568,65871504288847215551031759568
%N Number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock singular
%C Diagonal of A184773
%e Some solutions for 3X3
%e ..0..0..3....3..0..1....3..0..0....0..2..3....3..2..1....0..2..0....3..0..3
%e ..0..0..3....3..0..3....3..0..3....0..0..0....0..0..0....0..0..0....0..0..2
%e ..2..0..0....3..0..2....1..0..3....2..1..3....2..1..1....1..1..3....1..0..2
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 21 2011