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A020621 Smallest nonempty set S containing prime divisors of 8k+9 for each k in S. 1

%I

%S 5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,71,79,83,97,101,107,

%T 109,113,127,139,149,151,157,163,173,193,199,241,257,307,317,337,353,

%U 389,421,431,433,467,491,499,503,509,541,577,631,641,673,683,881,1201

%N Smallest nonempty set S containing prime divisors of 8k+9 for each k in S.

%H Nathaniel Johnston, <a href="/A020621/b020621.txt">Table of n, a(n) for n = 1..81</a> (full sequence)

%K nonn,fini,full

%O 1,1

%A _David W. Wilson_

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Last modified June 21 16:32 EDT 2021. Contains 345365 sequences. (Running on oeis4.)