%I #3 Jan 21 2013 11:41:16
%S 0,40,2594,233781,17254611,1312503181,99007036296,7489842900854
%N Number of 4Xn arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, without move-in move-out left turns
%C Row 4 of A221655
%e Some solutions for n=3
%e ..1..2..1....0..2..1....0..2..1....0..2..1....0..2..1....1..2..0....1..0..0
%e ..0..2..0....0..3..1....0..1..1....0..2..1....0..3..0....0..3..0....1..4..1
%e ..0..0..1....1..1..0....1..4..0....0..2..1....1..1..0....1..1..1....0..2..0
%e ..1..4..0....0..2..1....0..1..1....1..2..0....2..2..0....0..2..1....1..2..0
%K nonn
%O 1,2
%A _R. H. Hardin_ Jan 21 2013
|