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Search: id:A110038
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| A110038 |
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Smallest prime beginning (through <*2+1>) or <*2-1>) a complete Cunningham chain (of the first or the second kind) of length n. |
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4
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OFFSET
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1,1
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COMMENT
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The word "complete" indicates each chain is exactly n primes long (i.e. the chain cannot be a subchain of another one).
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LINKS
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Chris Caldwell's Prime Glossary, Cunningham chains.
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EXAMPLE
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a(2)=29 is here because through <2p+1>, 29->59 and the chain ends here (with this operator).
a(3)=19 is here because through <2p-1>, 19->37->73 and the chain ends here (with this operator).
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MAPLE
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Terms computed by Gilles Sadowski
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CROSSREFS
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Cf. A023272, A023302, A023330, A005384, A005385, A059452, A059455, A007700, Cf. A059759, A059760, A059761, A059762, A059763, A059764, A059765, A038397, A104349, A091314, A069362, A016093, A014937, A057326.
Adjacent sequences: A110035 A110036 A110037 this_sequence A110039 A110040 A110041
Sequence in context: A000797 A134468 A032611 this_sequence A081985 A087937 A103739
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KEYWORD
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easy,nonn,uned
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AUTHOR
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Alexandre Wajnberg (alexandre.wajnberg(AT)ulb.ac.be), Sep 03 2005
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