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%I #3 Jan 19 2013 20:47:39
%S 4,503,48018,4107189,354544219,30591390580,2639211238177,
%T 227683834800188
%N Number of nX4 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, without move-in move-out left turns
%C Column 4 of A221551
%e Some solutions for n=3
%e ..1..0..2..2....0..2..0..2....1..2..0..0....2..2..1..0....2..2..0..1
%e ..2..1..2..0....1..2..2..2....1..3..0..1....1..0..1..0....0..0..1..1
%e ..0..0..1..1....0..0..1..0....1..1..2..0....1..2..1..1....1..3..1..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 19 2013