OFFSET
0,1
EXAMPLE
a(0) = 2, a(3) = 7 as the product 8*9*10 has three prime divisors 2, 3 and 5.
CROSSREFS
KEYWORD
dead
AUTHOR
Amarnath Murthy, Oct 29 2002
EXTENSIONS
More terms from Donovan Johnson, Sep 09 2008
STATUS
approved