A020574 Smallest nonempty set S containing prime divisors of k + 10 for each k in S.

3, 7, 11, 13, 17, 23

Offset

1,1

Links

Table of n, a(n) for n=1..6.

Example

3 + 10 = 13, which is in the set.
7 + 10 = 17, which is in the set.
11 + 10 = 21 = 3 * 7, both of which are in the set.
13 + 10 = 23, which is in the set.
17 + 10 = 27 = 3^3, and 3 is in the set.
23 + 10 = 33 = 3 * 11, both of which are in the set.

Crossrefs

Sequence in context: A310194 A310195 A310196 * A020618 A184865 A055211

Adjacent sequences: A020571 A020572 A020573 * A020575 A020576 A020577

Keyword

nonn,fini,full

Author

David W. Wilson

Status

approved