This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A089282 Number of distinct prime factors of floor(pi*10^n), pi=3.14... 4
 1, 1, 2, 2, 3, 1, 2, 3, 5, 3, 4, 2, 3, 3, 3, 3, 5, 2, 6, 5, 4, 6, 7, 6, 3, 4, 8, 3, 4, 6, 4, 6, 7, 2, 4, 4, 6, 1, 5, 2, 4, 5, 3, 5, 4, 6, 5, 3, 7, 3, 5, 5, 3, 6, 7, 5, 4, 5, 4, 6, 5, 7, 3, 5, 4, 6, 5, 5, 3, 4, 7, 8, 6, 6, 6, 5, 5, 6, 8, 5, 5 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS a(n)=A001221(A011545(n)). LINKS EXAMPLE n=6: floor(pi*10^6)=3141592=2*2*2*392699: a(6)=2. CROSSREFS Cf. A089283, A000796. Sequence in context: A055460 A067514 A115323 * A308640 A079688 A261789 Adjacent sequences:  A089279 A089280 A089281 * A089283 A089284 A089285 KEYWORD nonn AUTHOR Reinhard Zumkeller, Oct 30 2003 EXTENSIONS More terms from Ray Chandler, Oct 31 2003 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 October 15 23:54 EDT 2019. Contains 328038 sequences. (Running on oeis4.)