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%I #10 Aug 08 2018 04:32:10
%S 3,7,11,13,17,23
%N Smallest nonempty set S containing prime divisors of k + 10 for each k in S.
%e 3 + 10 = 13, which is in the set.
%e 7 + 10 = 17, which is in the set.
%e 11 + 10 = 21 = 3 * 7, both of which are in the set.
%e 13 + 10 = 23, which is in the set.
%e 17 + 10 = 27 = 3^3, and 3 is in the set.
%e 23 + 10 = 33 = 3 * 11, both of which are in the set.
%K nonn,fini,full
%O 1,1
%A _David W. Wilson_
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