%I #3 Jan 06 2013 19:58:23
%S 0,4096,5822,1250753956,278802326676,1080371161000000,
%T 720107530988047980,1273696206975009956961,1220346471047321694829098
%N Number of 7Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, with no occupancy greater than 2
%C Row 7 of A221255
%e Some solutions for n=3
%e ..1..2..0....0..2..2....0..2..0....1..2..0....1..2..0....0..2..0....1..2..0
%e ..1..2..0....0..2..0....1..2..0....0..2..0....0..2..1....1..2..0....0..2..0
%e ..0..2..2....0..2..1....2..2..0....1..2..1....0..2..1....1..2..1....1..2..1
%e ..0..2..0....0..2..0....0..2..0....0..2..0....0..2..0....1..2..1....0..2..0
%e ..0..2..1....2..2..0....1..2..1....2..2..0....1..2..2....0..2..1....1..2..0
%e ..0..2..2....0..2..1....1..2..1....0..2..1....0..2..1....0..2..0....1..2..1
%e ..0..2..0....0..2..1....0..2..0....0..2..1....0..2..0....1..2..0....1..2..0
%K nonn
%O 1,2
%A _R. H. Hardin_ Jan 06 2013