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A172719
Number of 9*n X 18 0..2 arrays with row sums 2 and column sums n
1
12504636144000, 9055359650665478876752602576000, 46455761324619133018320834819622638940550400000000, 571951409844641024133465142141641285731325047530743069428902050000000
OFFSET
1,1
LINKS
CROSSREFS
Sequence in context: A103575 A172551 A172615 * A226954 A068747 A238357
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 06 2010
STATUS
approved