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 A179687 a(n) = 2*q(n)-1 where q(n) is the sequence of records positions of A179686 2
 3, 5, 7, 19, 27, 37, 47, 53, 67, 95, 101, 103, 107, 131, 149, 173, 181, 191, 227, 239, 263, 293, 311, 317, 349, 359, 367, 373, 383, 419, 461, 463, 479, 509, 547, 557, 587, 613, 619, 647, 653, 677, 701, 743, 751, 773, 787, 821, 841, 863, 887, 947 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The record positions are q(n) = 2, 3, 4, 10, 14, 19, 24, 27, 34,... Sequences A179382, A179383, A179480, A179481, A179686 and this sequence show that their terms depend on prime power factorization of 2*n-1. Nevertheless, this question yet is waiting its research. Most likely that almost all terms of this sequence are primes (27, 95, 841,... are not). LINKS CROSSREFS Cf. A179382, A179383, A179480, A179481, A179686 Sequence in context: A154524 A184805 A079131 * A106919 A005850 A052334 Adjacent sequences:  A179684 A179685 A179686 * A179688 A179689 A179690 KEYWORD nonn AUTHOR Vladimir Shevelev, Jul 24 2010 EXTENSIONS Extended beyond a(7) by R. J. Mathar, Dec 04 2011 STATUS approved

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Last modified October 23 12:54 EDT 2019. Contains 328345 sequences. (Running on oeis4.)