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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A141791 Primes of the form c(n)-n, where c(n)=n-th composite. 1
3, 5, 5, 5, 7, 7, 7, 11, 13, 13, 13, 17, 17, 17, 17, 17, 19, 19, 19, 19, 19, 23, 23, 23, 29, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 37, 37, 37, 37, 37, 41, 41, 41, 41, 41, 43, 43, 43, 43, 43, 43, 43, 43, 43, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 53, 59, 59, 59, 59, 59 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
c(n)=A002808(n).
Entries may be repeated and are shown in order of increasing generator n.
LINKS
EXAMPLE
n=1: c(1)-1=4-1=3=a(1).
n=3: c(3)-3=8-3=5=a(2).
n=4: c(4)-4=9-4=5=a(3).
n=5: c(5)-5=10-5=5=a(4).
n=7: c(7)-7=14-7=7=a(5).
MATHEMATICA
Module[{cmps=Select[Range[300], CompositeQ]}, Select[#[[1]]-#[[2]]&/@ Thread[ {cmps, Range[Length[cmps]]}], PrimeQ]] (* Harvey P. Dale, Jan 15 2020 *)
CROSSREFS
Sequence in context: A196604 A131506 A113722 * A196158 A290561 A278545
KEYWORD
nonn
AUTHOR
Juri-Stepan Gerasimov, Sep 13 2008, Feb 15 2009
EXTENSIONS
Corrected and extended by R. J. Mathar, Sep 26 2008
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 28 10:31 EDT 2024. Contains 371240 sequences. (Running on oeis4.)