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A068738
Number of solenoidal flows (flow in = flow out) in an n X n square array with integer velocities in -13 .. 13.
35
1, 27, 199655, 547436323149, 535691029084640060219
OFFSET
1,2
CROSSREFS
By size 3 X 3, ..., 6 X 6 A068722-A068725, by velocity limit 1..13 A068726-A068738.
Sequence in context: A008974 A308537 A281956 * A377768 A132649 A086166
KEYWORD
nonn,more
AUTHOR
R. H. Hardin, Feb 26 2002
EXTENSIONS
a(5) from Sean A. Irvine, Mar 10 2024
STATUS
approved