A224420 Primes of the form 3^n - n.

2, 7, 6553, 3486784381, 12157665459056928761, 41745579179292917813953351511015323088870709281977, 30432527221704537086371993251530170531786747066636939

Offset: 1

Author

Alex Ratushnyak, Apr 06 2013

Keywords

• nonn

Comments

The next term is too big to display. Corresponding n are given in A058037.

Crossrefs

Cf. A081296, A024024, A224451, A058037.

Programs

Mathematica

Select[Table[3^k - k, {k, 2, 200, 2}], PrimeQ] (* Bruno Berselli, Apr 07 2013 *)