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A020575 Smallest nonempty set S containing prime divisors of 2k+1 for each k in S. +0
1
3, 5, 7, 11, 13, 19, 23, 47 (list; graph; listen)
OFFSET

1,1
CROSSREFS

Adjacent sequences: A020572 A020573 A020574 this_sequence A020576 A020577 A020578

Sequence in context: A079733 A095747 A075323 this_sequence A055072 A059334 A130761

KEYWORD

nonn,fini,full

AUTHOR

David W. Wilson (davidwwilson(AT)comcast.net)

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Last modified October 5 16:50 EDT 2008. Contains 144613 sequences.

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