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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
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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 August 18 18:48 EDT 2024. Contains 375273 sequences. (Running on oeis4.)