login
A172711
Number of 7*n X 7 0..2 arrays with row sums 2 and column sums 2*n
1
9135630, 18126466426218150, 76497104228450459248094400, 447362835296127429187676764430583750, 3140955188547844588635579044406639849274718880
OFFSET
1,1
LINKS
CROSSREFS
Sequence in context: A015350 A233613 A172620 * A187675 A205615 A251399
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 06 2010
STATUS
approved