%I A068728
%S A068728 1,7,925,3096791,251611610655,500885416261650533
%N A068728 Number of solenoidal flows (flow in = flow out) in an n X n square array 
               with integer velocities in -3 .. 3.
%Y A068728 By size 3 X 3, ..., 6 X 6 A068722-A068725, by velocity limit 1..13 A068726-A068738.
%Y A068728 Sequence in context: A093171 A127102 A038808 this_sequence A028990 A151579 
               A024098
%Y A068728 Adjacent sequences: A068725 A068726 A068727 this_sequence A068729 A068730 
               A068731
%K A068728 nonn
%O A068728 1,2
%A A068728 Ron Hardin (rhhardin(AT)att.net), Feb 26 2002