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%I A179687 #5 Mar 30 2012 18:52:59
%S A179687 3,5,7,19,27,37,47,53,67,95,101,103,107,131,149,173,181,191,227,239,
%T A179687 263,293,311,317,349,359,367,373,383,419,461,463,479,509,547,557,587,
%U A179687 613,619,647,653,677,701,743,751,773,787,821,841,863,887,947
%N A179687 a(n) = 2*q(n)-1 where q(n) is the sequence of records positions of A179686
%C A179687 The record positions are q(n) = 2, 3, 4, 10, 14, 19, 24, 27, 34,...
%C A179687 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).
%Y A179687 Cf. A179382, A179383, A179480, A179481, A179686
%K A179687 nonn
%O A179687 1,1
%A A179687 _Vladimir Shevelev_, Jul 24 2010
%E A179687 Extended beyond a(7) by R. J. Mathar, Dec 04 2011

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