A138941 Primes of the form (13^k - 3^k)/10.

6274633, 3405994336744928448432949523054569, 469545242509890879708897137286442565790534241

Offset

1,1

Comments

The next term (a(4)) has 299 digits. - Harvey P. Dale, Dec 06 2017

Links

Amiram Eldar, Table of n, a(n) for n = 1..5

Mathematica

a={}; Do[p=(13^n-3^n)/10; If[PrimeQ[p], AppendTo[a, p]], {n, 1, 16^2}]; a
Select[Table[(13^n-3^n)/10, {n, 300}], PrimeQ] (* Harvey P. Dale, Dec 06 2017 *)

Crossrefs

Cf. A128028.

Sequence in context: A306872 A186838 A204654 * A251379 A203894 A391288

Adjacent sequences: A138938 A138939 A138940 * A138942 A138943 A138944

Keyword

nonn

Author

Vladimir Joseph Stephan Orlovsky, May 16 2008

Status

approved