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Search: id:A087641
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| A087641 |
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Start of the first string of exactly n consecutive pairs of twin primes. |
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+0
7
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| 29, 101, 5, 9419, 909287, 325267931, 678771479, 1107819732821, 170669145704411, 3324648277099157
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Smallest twin prime clusters of order n such that the following and preceding two primes must be neither twin primes between themselves nor with the ends of the string - Herman Jamke (hermanjamke(AT)fastmail.fm), Oct 22 2006
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LINKS
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Hugo Pfoertner, Consecutive pairs of twin primes. FORTRAN program.
C. Rivera, Puzzle 122. Consecutive Twin primes.
Eric Weisstein's World of Mathematics, Twin Prime Cluster
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EXAMPLE
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a(6)=325267931 is the starting point of the first occurrence of 6 consecutive pairs of twin primes: (325267931 325267933) (325267937 325267939) (325267949 325267951) (325267961 325267963) (325267979 325267981) (325267991 325267993).
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CROSSREFS
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Cf. A001359. The sequence consists of the initial terms of A035789, A035790, A035791, A035792, A035793, A035794, A035795.
Cf. A111950.
Sequence in context: A138625 A154405 A092373 this_sequence A161665 A127464 A142109
Adjacent sequences: A087638 A087639 A087640 this_sequence A087642 A087643 A087644
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KEYWORD
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more,nonn
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AUTHOR
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Hugo Pfoertner (hugo(AT)pfoertner.org), Sep 15 2003
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EXTENSIONS
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Extended by Jud McCranie (j.mccranie(AT)comcast.net). a(8)>10^12.
More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Oct 22 2006
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