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

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

Offset: 1

Author

Vladimir Joseph Stephan Orlovsky, Jun 13 2009

Keywords

• nonn

Comments

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

Crossrefs

Cf. A082101

Programs

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 *)

Extensions

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

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