A068731 Number of solenoidal flows (flow in = flow out) in an n X n square array with integer velocities in -6 .. 6.

1, 13, 10795, 773568107, 4598900066440609, 2286173927365217148894607

Offset

1,2

Links

Table of n, a(n) for n=1..6.

Crossrefs

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

Sequence in context: A173840 A260457 A219315 * A189309 A203707 A176096

Adjacent sequences: A068728 A068729 A068730 * A068732 A068733 A068734

Keyword

nonn,more

Author

R. H. Hardin, Feb 26 2002

Extensions

a(5)-a(6) from Sean A. Irvine, Mar 08 2024

Status

approved