%I #5 Dec 18 2015 18:17:42
%S 8,343,54769,34412915,85151401909,832274517610173
%N Number of n X n symmetric 0..7 arrays with no element equal to the sum mod 8 of any two of its horizontal and vertical neighbors
%e Some solutions for 4X4
%e ..4..4..4..2....0..6..2..6....4..4..4..4....0..2..4..4....0..2..4..4
%e ..4..4..7..2....6..2..6..3....4..4..5..4....2..0..3..4....2..0..7..2
%e ..4..7..2..6....2..6..7..0....4..5..6..5....4..3..4..7....4..7..1..7
%e ..2..2..6..6....6..3..0..6....4..4..5..4....4..4..7..0....4..2..7..3
%K nonn
%O 1,1
%A _R. H. Hardin_ Jul 18 2011