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

1,3

Comments

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

Links

Table of n, a(n) for n=1..16.

Formula

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

Crossrefs

Cf. A138613, A033766, A001222.

Sequence in context: A181655 A218938 A018567 * A054160 A034426 A000075

Adjacent sequences: A079485 A079486 A079487 * A079489 A079490 A079491

Keyword

nonn,more

Author

N. J. A. Sloane, Sep 20 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

Status

approved