The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A051438 a(n) = prime(2^n - 1). 8
 2, 5, 17, 47, 127, 307, 709, 1613, 3659, 8147, 17851, 38867, 84011, 180497, 386083, 821603, 1742527, 3681113, 7754017, 16290041, 34136021, 71378551, 148948133, 310248233, 645155191, 1339484149, 2777105117, 5750079043, 11891268397, 24563311217, 50685770143 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Hugo Pfoertner, Table of n, a(n) for n = 1..57 FORMULA a(n) = A181363(2^n - 1). - Reinhard Zumkeller, Oct 16 2010 a(n) = A000040(A000225(n)). - Michel Marcus, Nov 28 2017 MATHEMATICA Prime[2^Range[34] - 1] (* Vladimir Joseph Stephan Orlovsky, Jul 19 2011 *) PROG (PARI) a(n)=prime(2^n-1) \\ Charles R Greathouse IV, Sep 28 2015 CROSSREFS Cf. A000040, A000225, A033844, A018249, A051440, A051439. Sequence in context: A275210 A219554 A074494 * A368756 A148401 A148402 Adjacent sequences: A051435 A051436 A051437 * A051439 A051440 A051441 KEYWORD nonn AUTHOR N. J. A. Sloane EXTENSIONS More terms from Michael Lugo (mlugo(AT)thelabelguy.com), Dec 22 1999 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 June 12 18:11 EDT 2024. Contains 373359 sequences. (Running on oeis4.)