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A172797
Number of 7*n X 7 0..3 arrays with row sums 3 and column sums 3*n
1
4662857360, 19483897303054057473600, 177485739636656023698217362159890000, 2255071025881975002973276574847623754650721480000, 34489400617513696317244454709620842599380338820310459110031360
OFFSET
1,1
LINKS
CROSSREFS
Sequence in context: A280182 A034916 A172726 * A199631 A124977 A128172
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 06 2010
STATUS
approved