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%I #5 Dec 18 2015 18:17:41
%S 5,64,1212,46984,3644772,576095092,189451753044,131372808313824,
%T 193374015990002468
%N Number of n X n symmetric 0..4 arrays with no element equal to the sum mod 5 of any two of its horizontal and vertical neighbors
%e Some solutions for 4X4
%e ..4..1..4..1....3..0..1..0....3..0..3..4....2..0..4..3....0..1..0..2
%e ..1..4..4..3....0..1..4..1....0..3..0..3....0..2..3..0....1..0..2..3
%e ..4..4..4..1....1..4..4..3....3..0..1..2....4..3..0..3....0..2..0..2
%e ..1..3..1..1....0..1..3..0....4..3..2..3....3..0..3..4....2..3..2..3
%K nonn
%O 1,1
%A _R. H. Hardin_ Jul 18 2011