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%I #5 Dec 18 2015 18:17:41
%S 6,123,5571,643473,194123061,159836740359,373087393798011,
%T 2568694794232177467
%N Number of n X n symmetric 0..5 arrays with no element equal to the sum mod 6 of any two of its horizontal and vertical neighbors
%e Some solutions for 4X4
%e ..3..0..5..1....3..0..2..1....0..1..3..5....3..3..4..4....3..3..3..3
%e ..0..2..0..5....0..1..4..1....1..3..3..3....3..4..3..3....3..1..5..1
%e ..5..0..5..2....2..4..5..4....3..3..4..3....4..3..3..4....3..5..3..5
%e ..1..5..2..2....1..1..4..4....5..3..3..1....4..3..4..3....3..1..5..3
%K nonn
%O 1,1
%A _R. H. Hardin_ Jul 18 2011
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