%I A083571
%S A083571 2,3,5,10,12,72
%N A083571 Numbers n such that A008509(n) is prime.
%H A083571 P. De Geest, <a href="http://www.worldofnumbers.com/subtria.htm">Subsets 
               of palindromic triangulars</a>
%Y A083571 Cf. A008509, A050722, A008510, A050721.
%Y A083571 Sequence in context: A039022 A079251 A050051 this_sequence A123090 A129281 
               A022426
%Y A083571 Adjacent sequences: A083568 A083569 A083570 this_sequence A083572 A083573 
               A083574
%K A083571 nonn,base,hard
%O A083571 1,1
%A A083571 N. J. A. Sloane (njas(AT)research.att.com), Jun 14, 2003