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A020637 Smallest nonempty set S containing prime divisors of 10k+9 for each k in S. 1
7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 61, 67, 73, 79, 83, 89, 97, 101, 103, 107, 127, 131, 139, 149, 151, 163, 167, 173, 179, 181, 197, 199, 211, 223, 227, 233, 239, 257, 263, 283, 307, 311, 313, 331, 353, 379, 389, 397, 409, 419, 431, 439, 479 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Nathaniel Johnston, Table of n, a(n) for n = 1..168 (full sequence)

CROSSREFS

Sequence in context: A090459 A090417 A020631 * A020633 A078873 A020603

Adjacent sequences:  A020634 A020635 A020636 * A020638 A020639 A020640

KEYWORD

nonn,fini,full

AUTHOR

David W. Wilson

STATUS

approved

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Last modified December 11 10:48 EST 2018. Contains 318049 sequences. (Running on oeis4.)