# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a020628 Showing 1-1 of 1 %I A020628 #6 Mar 30 2012 18:35:15 %S A020628 3,5,7,11,13,17,23,41,43,53,71,79,83,127,131,151,239,251,383,691,719, %T A020628 1151 %N A020628 Smallest nonempty set S containing prime divisors of 9k+6 for each k in S. %K A020628 nonn,fini,full %O A020628 1,1 %A A020628 _David W. Wilson_ # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE