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%I #5 Dec 18 2015 18:17:42
%S 8,350,75812,86657138,519573586778,16183893186795145,
%T 2624329648165988321828
%N Number of n X n symmetric 0..7 arrays with no element equal to the product mod 8 of any two of its horizontal and vertical neighbors
%e Some solutions for 4X4
%e ..0..2..4..3....0..2..0..5....0..2..0..3....0..2..4..1....0..2..0..2
%e ..2..0..1..2....2..0..7..6....2..0..5..3....2..0..5..7....2..0..5..3
%e ..4..1..2..0....0..7..5..7....0..5..2..3....4..5..2..1....0..5..3..2
%e ..3..2..0..6....5..6..7..0....3..3..3..6....1..7..1..6....2..3..2..3
%K nonn
%O 1,1
%A _R. H. Hardin_ Jul 29 2011