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A172615
Number of 9*n X 18 0..1 arrays with row sums 2 and column sums n
1
12504636144000, 3237415247416050491577971184000, 6055976192395031960092036887782708145734400000000, 27298383003921247460630029918586935761007187118066456599356950000000
OFFSET
1,1
LINKS
CROSSREFS
Sequence in context: A261151 A103575 A172551 * A172719 A226954 A068747
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 06 2010
STATUS
approved