

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
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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*n1. 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

Table of n, a(n) for n=1..52.


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



