

A057462


Numbers n such that 10*11^n + 1 is prime.


2




OFFSET

1,2


COMMENTS

a(9) > 2*10^5.  Robert Price, Jan 19 2015


LINKS

Table of n, a(n) for n=1..8.


MATHEMATICA

Do[ If[ PrimeQ[ 10*11^n + 1 ], Print[ n ] ], {n, 0, 1000} ]
Select[Range[0, 4000], PrimeQ[(10*11^# + 1)] &] (* Vincenzo Librandi, Sep 28 2012 *)


PROG

(PARI) is(n)=ispseudoprime(10*11^n+1) \\ Charles R Greathouse IV, Jun 13 2017


CROSSREFS

Sequence in context: A103071 A264296 A265150 * A180043 A251317 A251201
Adjacent sequences: A057459 A057460 A057461 * A057463 A057464 A057465


KEYWORD

nonn


AUTHOR

Robert G. Wilson v, Sep 08 2000


EXTENSIONS

a(5) from Vincenzo Librandi, Sep 28 2012
a(6)a(8) from Robert Price, Jan 19 2015


STATUS

approved



