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A068726
Number of solenoidal flows (flow in = flow out) in an n X n square array with integer velocities in -1 .. 1.
17
1, 3, 35, 2053, 569397, 758541101, 4855339973053, 149596683621380451, 22207207625437795523567, 15894065026795563049567474623, 54873022990102933765115144179983347, 914167438412564688754864863927964270928677, 73512018227635160780006728165405332017240587741389
OFFSET
1,2
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 26 2002
EXTENSIONS
a(12)-a(13) from Sean A. Irvine, Mar 06 2024
STATUS
approved