The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A175961 n-th nonprime number appears n-th nonprime numbers times. 0
 1, 4, 4, 4, 4, 6, 6, 6, 6, 6, 6, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS A018252(n) appears A018252(n) times; 1 appears once, n-th composite number appears n-th composite number times; 1 together with A111655. LINKS FORMULA a(1)=1, a(n+1)=A111655(n). CROSSREFS Cf. A063905, A141468, A175944. Sequence in context: A179414 A139324 A111655 * A113646 A106325 A159835 Adjacent sequences:  A175958 A175959 A175960 * A175962 A175963 A175964 KEYWORD nonn,easy,less AUTHOR Juri-Stepan Gerasimov, Oct 31 2010 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 January 24 19:03 EST 2022. Contains 350565 sequences. (Running on oeis4.)