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%I #4 Mar 31 2012 12:36:46
%S 1,123,1857,135315,3767643,227460779,8550543057,461409633685,
%T 19953260512267,1020672385339045,47169124107393747,
%U 2357295503312609943,112529204189556106109,5573350513364442367517,270509318554502643186297
%N Number of zero-sum nX3 -3..3 arrays with every element equal to at least one horizontal or vertical neighbor
%C Column 3 of A202134
%e Some solutions for n=3
%e ..0..0..1....3..3..3....2..2.-3....3..3.-1...-2..2..2....2.-2.-2....1..1.-3
%e ..0..1..1....0.-3.-3...-3..2.-3....0..0.-1...-2.-2..2....2..2..2....0..0.-3
%e .-2.-2..1....0..0.-3...-3..3..3....0.-2.-2...-2..1..1....2.-3.-3....0..2..2
%K nonn
%O 1,2
%A _R. H. Hardin_ Dec 11 2011