

A079488


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


2



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



