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%I
%S 0,2,54,12270,19521328,240257613761,22596355738886108
%N Number of n X n arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without move-in move-out left turns
%C Diagonal of A221609
%e Some solutions for n=3
%e ..0..1..1....1..2..0....0..2..2....0..3..1....0..3..1....0..3..1....1..1..0
%e ..1..3..0....1..1..0....0..2..0....1..1..0....0..1..1....1..0..0....1..3..0
%e ..0..2..1....1..3..0....1..2..0....0..2..1....1..2..0....1..3..0....1..2..0
%K nonn
%O 1,2
%A _R. H. Hardin_ Jan 20 2013
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