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 A035791 Start of a string of exactly 3 consecutive (but disjoint) pairs of twin primes. 11
 5, 179, 809, 3359, 4217, 6761, 18041, 21587, 26861, 49367, 67187, 80447, 82721, 91127, 97841, 98897, 103967, 109829, 122597, 154157, 178037, 203321, 208931, 225749, 227609, 236867, 243671, 251201, 266447, 285611, 289109, 295871, 317729 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 REFERENCES Posting to Number Theory List (NMBRTHRY(AT)LISTSERV.NODAK.EDU), Nov. 19 1998. LINKS Sebastian Petzelberger, Table of n, a(n) for n = 1..10000 EXAMPLE a(2)=179 because (179,181),(191,193),(197,199) is the second occurrence (after (5,7),(11,13),(17,19)) of exactly 3 pairs of twin primes. MATHEMATICA Select[Prime@ Range@ 30000, And[ NextPrime[#, -1] - NextPrime[#, -2] != 2, NextPrime@ # - # == 2, NextPrime[#, 3] - NextPrime[#, 2] == 2, NextPrime[#, 5] - NextPrime[#, 4] == 2, NextPrime[#, 7] - NextPrime[#, 6] > 2] &] (* Michael De Vlieger, Apr 25 2015 *) Select[Partition[Prime[Range[30000]], 10, 1], #[[8]]-#[[7]]==#[[6]]-#[[5]] == #[[4]] - #[[3]]==2&&#[[2]]-#[[1]]!=2&&#[[10]]-#[[9]]!=2&][[All, 3]] (* Harvey P. Dale, Mar 14 2018 *) CROSSREFS Cf. A035789, A035790, A035792, A035793, A035794, A035795, A087641. Sequence in context: A210931 A141981 A136143 * A324090 A250327 A162136 Adjacent sequences:  A035788 A035789 A035790 * A035792 A035793 A035794 KEYWORD nonn,easy AUTHOR Randall Rathbun EXTENSIONS More terms from Hugo Pfoertner, Sep 05 2003 Offset corrected by Arkadiusz Wesolowski, May 06 2012 STATUS approved

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Last modified May 27 06:24 EDT 2019. Contains 323599 sequences. (Running on oeis4.)