%I A110680
%S A110680 9,21,43,49,61,63,69,73,87,109
%N A110680 Numbers n such that the string 4444n is prime.
%e A110680 If n=109 then 4444n = 4444109 (prime).
%Y A110680 Sequence in context: A107890 A110209 A053476 this_sequence A163205 A154862 
               A020137
%Y A110680 Adjacent sequences: A110677 A110678 A110679 this_sequence A110681 A110682 
               A110683
%K A110680 nonn,base
%O A110680 1,1
%A A110680 Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Sep 14 2005