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A068727
Number of solenoidal flows (flow in = flow out) in an n X n square array with integer velocities in -2 .. 2.
0
1, 5, 247, 160403, 1305759171, 134771061592765, 176541437214450498265, 2940055615889904390546839103, 623112842926151670996790416231139397
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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
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Last modified April 24 00:30 EDT 2024. Contains 371917 sequences. (Running on oeis4.)