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%I #6 Dec 18 2015 18:17:58
%S 1,4,262,84346,215340781,5191761888989,962798716189325069
%N Number of n X n 0..3 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors
%C Diagonal of A203846
%e Some solutions for n=4
%e ..1..3..3..0....0..3..3..2....3..3..2..0....2..2..0..0....0..2..3..3
%e ..1..3..3..2....2..3..3..2....3..3..2..1....2..2..0..0....1..2..3..3
%e ..2..3..3..2....2..1..0..2....0..0..3..3....0..3..3..1....3..3..0..3
%e ..2..2..2..2....2..2..2..2....0..0..3..3....0..3..3..1....3..3..3..3
%K nonn
%O 1,2
%A _R. H. Hardin_ Jan 06 2012
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