This site is supported by donations to The OEIS Foundation.

 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 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.

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