A068727 Number of solenoidal flows (flow in = flow out) in an n X n square array with integer velocities in -2 .. 2.

1, 5, 247, 160403, 1305759171, 134771061592765, 176541437214450498265, 2940055615889904390546839103, 623112842926151670996790416231139397

Offset: 1

Author

R. H. Hardin, Feb 26 2002

Keywords

• nonn
• more

Crossrefs

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

Extensions

a(9) from Sean A. Irvine, Mar 08 2024