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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A107608 Perfect powers which have the form prime(n) - n for some n. 3
 1, 1, 25, 32, 125, 128, 441, 529, 729, 961, 1089, 1369, 2025, 2809, 3375, 4489, 4900, 4913, 9216, 10201, 10404, 12167, 16384, 17576, 18225, 20736, 27889, 31684, 34596, 35344, 38416, 38809, 39601, 40804, 46656, 47961, 60516, 61009, 63504, 65025 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Corresponding n's in A107607. LINKS FORMULA a(n) = prime(A107607(n)) - A107607(n). MATHEMATICA f[n_] := Prime[n] - n; Select[f /@ Range[10^4], ! GCD @@ Last /@ FactorInteger[ # ] == 1 &] (* Ray Chandler, May 21 2005 *) CROSSREFS Cf. A001597 (perfect powers), A107605, A107606, A107607 (associated n). Sequence in context: A225418 A035140 A050694 * A219951 A209333 A131610 Adjacent sequences: A107605 A107606 A107607 * A107609 A107610 A107611 KEYWORD nonn AUTHOR Zak Seidov, May 17 2005 EXTENSIONS Extended by Ray Chandler, May 21 2005 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 January 28 05:03 EST 2023. Contains 359850 sequences. (Running on oeis4.)