%I A068729
%S A068729 1,9,2501,28905785,13336307324915
%N A068729 Number of solenoidal flows (flow in = flow out) in an n X n square array 
               with integer velocities in -4 .. 4.
%Y A068729 By size 3 X 3, ..., 6 X 6 A068722-A068725, by velocity limit 1..13 A068726-A068738.
%Y A068729 Sequence in context: A058428 A069704 A033997 this_sequence A159775 A162013 
               A046896
%Y A068729 Adjacent sequences: A068726 A068727 A068728 this_sequence A068730 A068731 
               A068732
%K A068729 nonn
%O A068729 1,2
%A A068729 Ron Hardin (rhhardin(AT)att.net), Feb 26 2002