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 A110092 Smallest prime ending (through <*2+1> or <*2-1> separately) a complete Cunningham chain (of the first or the second kind) of length n. 0
 17, 59, 73, 4079, 47, 2879, 1065601 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The word "complete" indicates each chain is exactly n primes long for the operator in function (i.e. the chain cannot be a subchain of another one); and the first and/or last term may not be involved in a chain of the other kind (i.e. the chain may not be connected to another one). LINKS Table of n, a(n) for n=1..7. Chris Caldwell's Prime Glossary, Cunningham chains. EXAMPLE a(1)=17 because 2, 3, 5, 7, 11 and 13 are part of longer chains whatever the operator; 17 is the first completely isolated prime. a(2)=59 because it ends the first two primes chain not connected to another one: 29->59. CROSSREFS Cf. A023272, A023302, A023330, A005384, A005385, A059452, A059455, A007700, Cf. A059759, A059760, A059761, A059762, A059763, A059764, A059765, A038397, A104349, A091314, A069362, A016093, A014937, A057326, A110059, A110056, A110038, A059766, A110027, A059764, A110025, A110024, A059763, A110022, A109998, A109946, A109927, A109835, A005603. Sequence in context: A058319 A095089 A106922 * A360155 A141896 A104165 Adjacent sequences: A110089 A110090 A110091 * A110093 A110094 A110095 KEYWORD easy,nonn AUTHOR Alexandre Wajnberg, Sep 04 2005 EXTENSIONS Terms computed by Gilles Sadowski. STATUS approved

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Last modified March 1 03:27 EST 2024. Contains 370430 sequences. (Running on oeis4.)