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A020574 Smallest nonempty set S containing prime divisors of k + 10 for each k in S. 0
3, 7, 11, 13, 17, 23 (list; graph; refs; listen; history; text; internal format)
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

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Last modified June 6 14:04 EDT 2020. Contains 334827 sequences. (Running on oeis4.)