OFFSET
1,1
FORMULA
a(n) = PROD(k^A008966(k): n <= k <= 2*n).
EXAMPLE
a(10) = 10*11*13*14*15*17*19 = 96996900;
a(11) = 11*13*14*15*17*19*21*22 = 4481256780;
a(12) = 13*14*15*17*19*21*22*23 = 9369900540.
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Jul 05 2010
EXTENSIONS
Example corrected by Reinhard Zumkeller, Jul 19 2010
STATUS
approved