A020628 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A020628

Smallest nonempty set S containing prime divisors of 9k+6 for each k in S.

3, 5, 7, 11, 13, 17, 23, 41, 43, 53, 71, 79, 83, 127, 131, 151, 239, 251, 383, 691, 719, 1151

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

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..22.

CROSSREFS

Sequence in context: A063908 A154868 A274987 * A108816 A088503 A118939

Adjacent sequences: A020625 A020626 A020627 * A020629 A020630 A020631

KEYWORD

nonn,fini,full

AUTHOR

David W. Wilson

STATUS

approved