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A172963
Number of 2*n X n 0..9 arrays with row sums 9 and column sums 18
1
1, 670, 133721236, 2043207067941480, 1047367983257881640491925, 10336768663024665454036757208361400, 1313075006655438005305387554231256477491331800
OFFSET
1,2
LINKS
CROSSREFS
Sequence in context: A250670 A235101 A232388 * A351668 A218795 A281526
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 06 2010
STATUS
approved