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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A074271 Previous term + prime(previous term). 12
 1, 3, 8, 27, 130, 863, 7554, 84385, 1165814, 19408513, 381328184, 8690396907, 226500350374, 6671888768963, 219904832427160, 8040978338951561, 323784549401655250, 14264968083112608087 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Table of n, a(n) for n=1..18. FORMULA a(1)=1; a(n)=a(n-1)+prime(a(n-1)). EXAMPLE a(4)=27 because a(3)=8, prime(8)=19 and 8+19=27. MATHEMATICA se={1}; a=1; Do[b=a+Prime[a]; se=Append[se, b]; a=b, {i, 13}]; se NestList[ Prime@# + # &, 1, 14] (* Robert G. Wilson v, Jul 17 2010 *) CROSSREFS Cf. A007097, A179274. - Robert G. Wilson v, Jul 17 2010 Sequence in context: A226061 A294197 A030495 * A005641 A260961 A230822 Adjacent sequences: A074268 A074269 A074270 * A074272 A074273 A074274 KEYWORD nonn AUTHOR Zak Seidov, Sep 21 2002 EXTENSIONS a(15) from Robert G. Wilson v, Jul 17 2010 a(16)-a(18) from Charles R Greathouse IV, Mar 15 2011 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.

Last modified August 2 22:39 EDT 2024. Contains 374875 sequences. (Running on oeis4.)