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A020581 Smallest nonempty set S containing prime divisors of 3k+1 for each k in S. 1
2, 5, 7, 11, 13, 17 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..6.

CROSSREFS

Sequence in context: A322969 A229470 A157829 * A081259 A177512 A118751

Adjacent sequences:  A020578 A020579 A020580 * A020582 A020583 A020584

KEYWORD

nonn,fini,full

AUTHOR

David W. Wilson

STATUS

approved

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Last modified September 24 03:26 EDT 2021. Contains 347623 sequences. (Running on oeis4.)