A162713 Primes of the form 3^p-2^p-2 generated from primes p.

3, 17, 328256958598444055417, 127173474823342767533669605649

Offset

1,1

Comments

a(5) has 4816 digits.

Links

Table of n, a(n) for n=1..4.

Mathematica

lst={}; Do[p=Prime[n]; If[PrimeQ[r=3^p - 2^p - 2], AppendTo[lst, r]], {n, 1000}]; lst (* Vincenzo Librandi, Sep 25 2015 *)
Select[3^#-2^#-2&/@Prime[Range[50]], PrimeQ] (* Harvey P. Dale, Dec 03 2024 *)

Prog

(Magma) [3^p-2^p-2: p in PrimesUpTo(4000) | IsPrime(3^p-2^p-2)]; // Vincenzo Librandi, Sep 25 2015

Crossrefs

Cf. A162712 (associated p).

Sequence in context: A378860 A051710 A215913 * A161473 A208493 A082056

Adjacent sequences: A162710 A162711 A162712 * A162714 A162715 A162716

Keyword

nonn

Author

Vincenzo Librandi, Jul 11 2009

Extensions

Edited by R. J. Mathar, Jul 26 2009

Status

approved