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!)
A095136 Number of distinct prime factors of A095134(n). 0
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 3, 1, 2, 3, 2, 2, 1, 2, 2, 3, 1, 3, 2, 1, 2, 2, 4, 1, 3, 4, 3, 1, 2, 3, 4, 4, 2, 3, 4, 3, 3, 4, 3, 5, 3, 6, 3, 5, 4, 3, 4, 2, 1, 2, 3, 2, 3, 2, 5, 5, 4, 3, 4, 6, 5, 2, 5, 3, 4, 1, 4, 2, 2, 3, 4 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,12

LINKS

Table of n, a(n) for n=1..80.

MATHEMATICA

PrimeFactors[n_] := Flatten[ Table[ #[[1]], {1} ] & /@ FactorInteger[n]]; f[n_] := Product[ Prime[i], {i, 2, n, 2}] + Product[ Prime[i], {i, 1, n, 2}]; f[1] = 2; Table[ Length[ PrimeFactors[ f[n]]], {n, 80}]

CROSSREFS

Cf. A095134.

Sequence in context: A014671 A029365 A204178 * A105540 A057043 A325307

Adjacent sequences:  A095133 A095134 A095135 * A095137 A095138 A095139

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, May 27 2004

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 13 12:37 EST 2019. Contains 329968 sequences. (Running on oeis4.)