A079488 Number of prime divisors (counted with multiplicity) of A138613(n).

1, 1, 2, 4, 7, 14, 23, 36, 72, 106, 172, 314, 542, 1008, 1766, 3151

Offset: 1

Author

N. J. A. Sloane, Sep 20 2008

Keywords

• nonn
• more

Comments

The old entry with this sequence number was a duplicate of A052553.

Crossrefs

Cf. A138613, A033766, A001222.

Formula

a(n) = A001222(A138613(n)). - R. J. Mathar, Sep 21 2008

Extensions

a(10) from R. J. Mathar, Sep 21 2008

a(11)-a(12) from Donovan Johnson, Dec 19 2008

a(13)-a(16) from Daniel Suteu, Dec 11 2019