A020634 - OEIS

%I #8 Mar 30 2012 18:35:15

%S 2,3,7,11,13,17,19,23,29,31,37,47,67,71,73,79,97,127,157,167,197,241,

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

%N Smallest nonempty set S containing prime divisors of 10k+4 for each k in S.

%Y Cf. A020596. [From _R. J. Mathar_, Oct 25 2008]

%K nonn,fini,full

%O 1,1

%A _David W. Wilson_