

A109076


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


10




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 (zevi_35711(AT)yahoo.com), Feb 29 2008
Edited by N. J. A. Sloane, Mar 02 2008
a(7) from Robert Price, May 11 2014


STATUS

approved



