

A109076


Numbers n such that 11^n + 2 is prime.


11




OFFSET

1,3


COMMENTS

No further terms < 100000.  Ray Chandler, Jul 30 2011
a(8) > 2*10^5.  Robert Price, May 11 2014


LINKS

Table of n, a(n) for n=1..7.


EXAMPLE

11^5 + 2 = 161053 is prime, hence 5 is a term.


MATHEMATICA

Do[If[PrimeQ[11^n + 2], Print[n]], {n, 0, 5000}]


PROG

(PARI) is(n)=isprime(11^n+2) \\ Charles R Greathouse IV, Feb 17 2017


CROSSREFS

Sequence in context: A002657 A046093 A097086 * A101683 A098135 A112259
Adjacent sequences: A109073 A109074 A109075 * A109077 A109078 A109079


KEYWORD

more,nonn


AUTHOR

Ryan Propper, Jun 17 2005


EXTENSIONS

8273 from Jason Earls, Feb 29 2008
Edited by N. J. A. Sloane, Mar 02 2008
a(7) from Robert Price, May 11 2014


STATUS

approved



