OFFSET
1,1
COMMENTS
EXAMPLE
40 has the prime factorization of 2^3 * 5^1. The exponents are therefore 3 and 1. Both 3 and 1 are coprime to 40. And 3+1 = 4 divides 40. So 40 is included in the sequence.
CROSSREFS
KEYWORD
nonn
AUTHOR
Leroy Quet, Sep 11 2008
EXTENSIONS
Extended by Ray Chandler, Nov 04 2008
STATUS
approved