%I #3 Jan 02 2013 19:46:43
%S 16,9801,3485689,1539699121,619901126244,259039174953636,
%T 106295637843093924,43910419047705413284
%N Number of nX6 arrays of occupancy after each element moves to some horizontal or vertical neighbor, with no occupancy greater than 2
%C Column 6 of A221139
%e Some solutions for n=3
%e ..0..1..1..2..2..1....0..2..1..2..0..1....0..1..2..1..0..1....0..1..2..1..2..0
%e ..0..0..1..1..0..2....0..1..1..2..1..1....0..1..2..1..0..2....0..2..2..0..1..0
%e ..1..2..2..1..0..1....0..1..2..0..2..1....1..2..2..2..0..0....0..2..2..1..1..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 02 2013