A138944 Primes of the form (17^k - 3^k)/14.

349, 2447992580749, 59088590134729116001

Offset: 1

Author

Vladimir Joseph Stephan Orlovsky, May 16 2008

Keywords

• nonn
• hard

Comments

The next term has 604 digits. - Harvey P. Dale, Dec 03 2021

Links

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

Crossrefs

Cf. A128031 (corresponding values of k).

Programs

Mathematica

a={};Do[p=(17^n-3^n)/14;If[PrimeQ[p],AppendTo[a,p]],{n,1,10^2}];a
Select[Table[(17^n-3^n)/14,{n,30}],PrimeQ] (* Harvey P. Dale, Dec 03 2021 *)