login
This site is supported by donations to The OEIS Foundation.

 

Logo

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A072699 Number of prime factors of A072697(n). 4
1, 1, 1, 1, 1, 1, 2, 1, 1, 2, 1, 1, 1, 2, 2, 1, 2, 1, 3, 1, 1, 2, 1, 2, 2, 1, 1, 2, 1, 2, 1, 1, 2, 3, 1, 1, 2, 2, 1, 2, 2, 2, 1, 1, 1, 3, 1, 1, 3, 2, 1, 3, 2, 2, 2, 1, 2, 1, 2, 1, 1, 2, 2, 2, 1, 1, 2, 1, 2, 2, 1, 1, 3, 1, 2, 1, 1, 2, 2, 3, 2, 1, 1, 3, 1, 1, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 3, 1, 1, 1, 3, 3, 1, 2, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,7

COMMENTS

a(n) = A001222(A072697(n)) = A001221(A072697(n)).

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

EXAMPLE

a(19) = A001222(A072697(19)) = A001222(42) = A001222(2*3*7) = 3.

CROSSREFS

Cf. A072698, A072700.

Sequence in context: A262885 A097305 A120675 * A143589 A003651 A325028

Adjacent sequences:  A072696 A072697 A072698 * A072700 A072701 A072702

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Jul 04 2002

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 5 15:11 EST 2019. Contains 329753 sequences. (Running on oeis4.)