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A172669
Number of 3*n X n 0..2 arrays with row sums 3 and column sums 9
1
0, 20, 1376095, 1252634243520, 8432855707512236000, 297155971199028097720850000, 42758542523186088601256526892620000, 20877662827076969301744211245461828236480000
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OFFSET
1,2
LINKS
R. H. Hardin,
Table of n, a(n) for n=1..23
CROSSREFS
Sequence in context:
A078354
A203306
A211489
*
A056104
A051117
A180725
Adjacent sequences:
A172666
A172667
A172668
*
A172670
A172671
A172672
KEYWORD
nonn
AUTHOR
R. H. Hardin
Feb 06 2010
STATUS
approved
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Last modified April 18 16:22 EDT 2024. Contains 371780 sequences. (Running on oeis4.)
