A161558 Primes of form 2^k+3^k-4.

31, 271, 2311, 94151567431, 847322163871, 450284043329950831, 239299329793567483011391, 13915193059764305948125655305497609574930528737031, 123329495011708990974900261530856061081804307325717309329809036625289391

Offset

1,1

Comments

Generated by k = 3, 5, 7, 23, 25, 37, 49, 103, 149, 211,....

Links

Table of n, a(n) for n=1..9.

Mathematica

lst={}; Do[If[PrimeQ[p=2^n+3^n-4], AppendTo[lst, p]], {n, 6!}]; lst
Select[Table[2^k+3^k-4, {k, 200}], PrimeQ] (* Harvey P. Dale, Apr 05 2019 *)

Crossrefs

Cf. A082101

Sequence in context: A125368 A126526 A008386 * A336279 A156094 A221430

Adjacent sequences: A161555 A161556 A161557 * A161559 A161560 A161561

Keyword

nonn

Author

Vladimir Joseph Stephan Orlovsky, Jun 13 2009

Extensions

Comment added by R. J. Mathar, Oct 04 2009

One more term (a(9)) from Harvey P. Dale, Apr 05 2019

Status

approved