A020635 - OEIS

%I #11 Feb 16 2013 16:30:24

%S 3,11,13,17,19,23,29,31,37,41,47,53,59,61,67,71,73,79,107,109,127,131,

%T 137,139,151,179,191,197,199,211,233,239,251,257,269,281,311,313,317,

%U 349,353,359,439,509,569,599,617,659,677,733,739,797,839,859,1039

%N Smallest nonempty set S containing prime divisors of 10k+7 for each k in S.

%H Nathaniel Johnston, <a href="/A020635/b020635.txt">Table of n, a(n) for n = 1..82</a> (full sequence)

%K nonn,fini,full

%O 1,1

%A _David W. Wilson_