login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A025001 a(1) = 5; a(n+1) = a(n)-th nonprime, where nonprimes begin at 0. 0
5, 8, 12, 18, 26, 36, 50, 68, 91, 120, 155, 200, 253, 318, 394, 485, 591, 717, 866, 1040, 1242, 1474, 1744, 2052, 2408, 2816, 3277, 3805, 4403, 5080, 5846, 6711, 7684, 8776, 10004, 11376, 12912, 14622, 16535, 18665, 21030, 23660, 26575, 29802, 33375, 37326 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..46.

MATHEMATICA

nn=38000; nps=Complement[Range[nn], Prime[Range[PrimePi[nn]]]]; nxt[n_]:= nps[[n-1]]; NestList[nxt, 5, 45] (* Harvey P. Dale, Sep 14 2012 *)

CROSSREFS

Sequence in context: A069102 A001043 A118775 * A020749 A120135 A162704

Adjacent sequences:  A024998 A024999 A025000 * A025002 A025003 A025004

KEYWORD

nonn

AUTHOR

David W. Wilson

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 November 22 03:20 EST 2019. Contains 329383 sequences. (Running on oeis4.)