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A020631 Smallest nonempty set S containing prime divisors of 9k+10 for each k in S. 1

%I

%S 7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,97,101,

%T 103,107,109,113,127,139,149,151,163,179,181,191,193,211,223,227,257,

%U 271,311,313,379,383,397,433,443,449,463,487,541,571,601,613,641,757

%N Smallest nonempty set S containing prime divisors of 9k+10 for each k in S.

%H Nathaniel Johnston, <a href="/A020631/b020631.txt">Table of n, a(n) for n = 1..117</a> (full sequence)

%K nonn,fini,full

%O 1,1

%A _David W. Wilson_

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Last modified May 8 17:26 EDT 2021. Contains 343666 sequences. (Running on oeis4.)