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%I #6 Dec 18 2015 18:17:58
%S 1,5,635,503409,3742207236,360171255368417
%N Number of n X n 0..4 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors
%C Diagonal of A203346
%e Some solutions for n=5
%e ..4..4..3..1..0....2..2..2..3..3....4..4..0..4..4....0..3..3..2..1
%e ..4..4..3..4..4....2..4..4..3..3....4..4..2..4..4....4..4..3..2..2
%e ..3..3..0..4..4....3..4..4..2..3....4..3..3..2..4....4..4..0..1..2
%e ..1..1..4..4..0....3..4..2..4..4....4..3..3..4..4....3..4..3..4..4
%e ..1..1..4..4..0....2..4..4..4..4....4..4..4..4..4....2..4..4..4..4
%K nonn
%O 1,2
%A _R. H. Hardin_ Dec 31 2011
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