A138943 Primes of the form (16^n - 3^n)/13.

19, 313, 1635972917889127228189253483929940713

Offset

1,1

Comments

The next term has 562 digits. - Harvey P. Dale, Mar 28 2013

Links

Table of n, a(n) for n=1..3.

Mathematica

a={}; Do[p=(16^n-3^n)/13; If[PrimeQ[p], AppendTo[a, p]], {n, 1, 10^2}]; a
Select[Table[(16^n-3^n)/13, {n, 500}], PrimeQ] (* Harvey P. Dale, Mar 28 2013 *)

Crossrefs

Cf. A128030.

Sequence in context: A032631 A142430 A180845 * A111420 A166965 A137352

Adjacent sequences: A138940 A138941 A138942 * A138944 A138945 A138946

Keyword

nonn,bref

Author

Vladimir Joseph Stephan Orlovsky, May 16 2008

Status

approved