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%I #9 Mar 06 2024 17:28:57
%S 1,3,35,2053,569397,758541101,4855339973053,149596683621380451,
%T 22207207625437795523567,15894065026795563049567474623,
%U 54873022990102933765115144179983347,914167438412564688754864863927964270928677,73512018227635160780006728165405332017240587741389
%N Number of solenoidal flows (flow in = flow out) in an n X n square array with integer velocities in -1 .. 1.
%Y By size 3 X 3, ..., 6 X 6 A068722-A068725, by velocity limit 1..13 A068726-A068738.
%K nonn
%O 1,2
%A _R. H. Hardin_, Feb 26 2002
%E a(12)-a(13) from _Sean A. Irvine_, Mar 06 2024