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%I #6 Dec 18 2015 18:17:58
%S 1,7,2422,7951793,307215779816
%N Number of n X n 0..6 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors
%C Diagonal of A203389
%e Some solutions for n=4
%e ..3..3..3..0....6..6..0..0....2..2..1..0....3..3..1..0....2..2..3..3
%e ..3..6..6..3....6..6..5..3....3..3..4..4....3..5..5..4....2..4..6..6
%e ..0..6..6..3....3..5..5..3....3..6..6..4....4..6..6..4....2..4..6..6
%e ..0..4..4..3....0..0..0..0....0..6..6..0....4..6..6..0....0..0..0..0
%K nonn
%O 1,2
%A _R. H. Hardin_ Jan 01 2012
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