A068729 Number of solenoidal flows (flow in = flow out) in an n X n square array with integer velocities in -4 .. 4.

1, 9, 2501, 28905785, 13336307324915, 247753867499441888279, 185592614324336736251073584343

Offset

1,2

Links

Table of n, a(n) for n=1..7.

Crossrefs

By size 3 X 3, ..., 6 X 6 A068722-A068725, by velocity limit 1..13 A068726-A068738.

Sequence in context: A278914 A069704 A033997 * A321282 A159775 A281538

Adjacent sequences: A068726 A068727 A068728 * A068730 A068731 A068732

Keyword

nonn,more

Author

R. H. Hardin, Feb 26 2002

Extensions

a(6)-a(7) from Sean A. Irvine, Mar 08 2024

Status

approved