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Smallest nonempty set S containing prime divisors of 5k+2 for each k in S.
1

%I #6 Mar 30 2012 18:35:14

%S 3,7,11,13,17,19,23,29,31,37,47,67,71,73,79,97,127,157,167,197,241,

%T 337,367,397,487,523,569,787,1741,1987,2437,2617,8707

%N Smallest nonempty set S containing prime divisors of 5k+2 for each k in S.

%K nonn,fini,full

%O 1,1

%A _David W. Wilson_