%I A111023
%S A111023 1,2,3,4,6,8,16,20,27,115,180,274,576,1111,2404
%N A111023 Integers n such that 9*10^n+11 is a prime number.
%C A111023 Some of the larger entries may only correspond to probable primes.
%e A111023 n = 6 is a member because: 9*10^6+11 = 9*1000000+11 = 9000011, which 
               is prime.
%t A111023 Do[If[PrimeQ[9*10^n+11],Print[n]],{n,1,1300}] - Zak Seidov (zakseidov(AT)yahoo.com), 
               Sep 14 2006
%Y A111023 Cf. A100275 = numbers n such that 9*10^n-11 is prime.
%Y A111023 Cf. A049054, A088274, A088275, A095688, A107083, A108049, A108050, A108052, 
               A108054, A110980.
%Y A111023 Sequence in context: A084239 A049708 A000031 this_sequence A008324 A084074 
               A144722
%Y A111023 Adjacent sequences: A111020 A111021 A111022 this_sequence A111024 A111025 
               A111026
%K A111023 nonn
%O A111023 1,2
%A A111023 Julien Peter Benney (jpbenney(AT)ftml.net), Oct 04 2005
%E A111023 Edited by N. J. A. Sloane (njas(AT)research.att.com), Apr 11 2008