A020623 Smallest nonempty set S containing prime divisors of 9k+1 for each k in S.

2, 7, 13, 19, 23, 43, 59, 97

Offset

1,1

Links

Table of n, a(n) for n=1..8.

Crossrefs

Sequence in context: A067774 A063637 A216526 * A109346 A140550 A271114

Adjacent sequences: A020620 A020621 A020622 * A020624 A020625 A020626

Keyword

nonn,fini,full

Author

David W. Wilson

Status

approved