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A020587 Smallest nonempty set S containing prime divisors of 4k+1 for each k in S. 2
3, 5, 7, 11, 13, 19, 29, 53, 71 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..9.

CROSSREFS

Sequence in context: A212375 A040993 A078425 * A249077 A126960 A119753

Adjacent sequences:  A020584 A020585 A020586 * A020588 A020589 A020590

KEYWORD

nonn,fini,full

AUTHOR

David W. Wilson

STATUS

approved

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Last modified October 15 12:29 EDT 2019. Contains 328026 sequences. (Running on oeis4.)