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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..12.

CROSSREFS

Sequence in context: A045405 A059311 A023209 * A151917 A059639 A059263

Adjacent sequences:  A020606 A020607 A020608 * A020610 A020611 A020612

KEYWORD

nonn,fini,full

AUTHOR

David W. Wilson

STATUS

approved

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Last modified June 30 19:43 EDT 2022. Contains 354945 sequences. (Running on oeis4.)