%I #6 Mar 30 2012 18:35:14
%S 2,3,11,13,17,19,23,31,37,41,43,73,83,257,293
%N Smallest nonempty set S containing prime divisors of 7k+5 for each k in S.
%K nonn,fini,full
%O 1,1
%A _David W. Wilson_