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A172553
Number of 2*n X n 0..1 arrays with row sums 3 and column sums 6
1
0, 0, 1, 2520, 56586600, 3718394156400, 617944896216648000, 231528006523766358806400, 178355054529362612768336870400, 262180318469859848392495320519360000
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OFFSET
1,4
LINKS
R. H. Hardin,
Table of n, a(n) for n=1..41
CROSSREFS
Sequence in context:
A123485
A282433
A228080
*
A172580
A172684
A172652
Adjacent sequences:
A172550
A172551
A172552
*
A172554
A172555
A172556
KEYWORD
nonn
AUTHOR
R. H. Hardin
Feb 06 2010
STATUS
approved
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Last modified May 8 19:26 EDT 2024. Contains 372341 sequences. (Running on oeis4.)