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%I #3 Jan 15 2013 07:33:45
%S 8,328,12668,492102,18852560,722442370,27665242848,1058237377670
%N Number of nX6 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, with every occupancy equal to zero or two
%C Column 6 of A221408
%e Some solutions for n=3
%e ..0..0..2..0..2..2....0..0..2..2..0..2....2..2..0..2..0..2....2..0..0..0..2..0
%e ..2..0..0..2..0..0....2..0..2..0..0..2....2..0..0..2..0..0....2..2..2..2..2..0
%e ..2..0..2..2..0..2....0..2..2..0..0..2....0..2..2..0..2..0....0..0..2..0..0..2
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 15 2013