A068726 Number of solenoidal flows (flow in = flow out) in an n X n square array with integer velocities in -1 .. 1.

1, 3, 35, 2053, 569397, 758541101, 4855339973053, 149596683621380451, 22207207625437795523567, 15894065026795563049567474623, 54873022990102933765115144179983347, 914167438412564688754864863927964270928677, 73512018227635160780006728165405332017240587741389

Offset

1,2

Links

Table of n, a(n) for n=1..13.

Crossrefs

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

Sequence in context: A012499 A125530 A334253 * A263512 A093583 A184458

Adjacent sequences: A068723 A068724 A068725 * A068727 A068728 A068729

Keyword

nonn

Author

R. H. Hardin, Feb 26 2002

Extensions

a(12)-a(13) from Sean A. Irvine, Mar 06 2024

Status

approved