OFFSET
1,1
EXAMPLE
a(1)=2080, 2080 is a triangular number and 2080=2*2*2*2*2*5*13 i.e. is a product of 7 prime factors so is 7-almost prime.
CROSSREFS
KEYWORD
base,easy,nonn
AUTHOR
Shyam Sunder Gupta, Oct 19 2002
STATUS
approved