%I #3 Jan 26 2013 07:17:21
%S 0,40,379,29412,854959,35948127,1290833232,49447514716,1844208808987,
%T 69554410132666,2610306743813999,98167800387966673
%N Number of 4Xn arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, without move-in move-out straight through or left turns
%C Row 4 of A221817
%e Some solutions for n=3
%e ..1..2..1....1..1..0....1..2..0....0..2..0....1..3..1....1..0..0....0..2..1
%e ..0..2..0....0..2..1....0..2..1....1..2..1....0..1..0....0..3..1....0..3..0
%e ..0..1..0....1..3..0....1..1..1....0..1..1....1..2..0....1..3..0....2..3..1
%e ..1..3..1....1..2..0....0..3..0....1..3..0....1..2..0....1..2..0....0..0..0
%K nonn
%O 1,2
%A _R. H. Hardin_ Jan 26 2013