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A020613 Smallest nonempty set S containing prime divisors of 7k+9 for each k in S. 0

%I

%S 2,5,11,17,23,31,43,113

%N Smallest nonempty set S containing prime divisors of 7k+9 for each k in S.

%K nonn,fini,full

%O 1,1

%A _David W. Wilson_

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Last modified October 22 01:48 EDT 2021. Contains 348160 sequences. (Running on oeis4.)