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A020623 Smallest nonempty set S containing prime divisors of 9k+1 for each k in S. 0
2, 7, 13, 19, 23, 43, 59, 97 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
CROSSREFS
Sequence in context: A067774 A063637 A216526 * A109346 A140550 A271114
KEYWORD
nonn,fini,full
AUTHOR
STATUS
approved

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Last modified May 24 01:04 EDT 2024. Contains 372765 sequences. (Running on oeis4.)