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A020588 Smallest nonempty set S containing prime divisors of 4k+2 for each k in S. 1
2, 3, 5, 7, 11, 13, 19, 23, 47 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

CROSSREFS

Cf. A020575.

Sequence in context: A130807 A030145 A285983 * A227202 A237827 A114111

Adjacent sequences:  A020585 A020586 A020587 * A020589 A020590 A020591

KEYWORD

nonn,fini,full

AUTHOR

David W. Wilson

STATUS

approved

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Last modified October 17 04:09 EDT 2019. Contains 328106 sequences. (Running on oeis4.)