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%I #5 Dec 18 2015 18:17:42
%S 6,216,46662,60466182,470185031232,21936950640377856
%N Number of n X n symmetric 0..6 arrays with no element equal to the sum mod 7 of all its horizontal and vertical neighbors
%e Some solutions for 4X4
%e ..0..3..1..5....0..3..0..0....0..3..1..0....0..3..0..0....0..3..0..1
%e ..3..0..5..2....3..0..2..6....3..0..1..4....3..0..0..2....3..0..1..3
%e ..1..5..0..4....0..2..0..1....1..1..1..0....0..0..4..1....0..1..6..0
%e ..5..2..4..0....0..6..1..0....0..4..0..4....0..2..1..3....1..3..0..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Jul 31 2011
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