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

1,2

Links

Table of n, a(n) for n=1..9.

Crossrefs

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

Sequence in context: A097323 A166943 A125533 * A135095 A219872 A282734

Adjacent sequences: A068724 A068725 A068726 * A068728 A068729 A068730

Keyword

nonn,more

Author

R. H. Hardin, Feb 26 2002

Extensions

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

Status

approved