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A020609
Smallest nonempty set S containing prime divisors of 7k+4 for each k in S.
0
3, 5, 11, 13, 19, 23, 107, 137, 251, 457, 587, 3203
OFFSET
1,1
CROSSREFS
Sequence in context: A045405 A059311 A023209 * A151917 A059639 A059263
KEYWORD
nonn,fini,full
STATUS
approved