

A164920


Primes which are obtained at least by two ways using the iterations of the Bertrand operator (see A164917) beginning with primes of A164368.


1




OFFSET

1,1


COMMENTS

The sequence is connected with our sieve selecting the primes of A164368 from all primes.


LINKS

Table of n, a(n) for n=1..10.
V. Shevelev, On critical small intervals containing primes, arXiv:0908.2319 [math.NT], 2009.


EXAMPLE

113 is in the sequence since it is obtained either by iterations of Bertrand operator beginning from 17 (17=>31=>61=>113) or by such iterations beginning with 59 (59=>113), and both of primes 17 and 59 are in A164368.


CROSSREFS

Cf. A006992, A164917, A164918, A104272, A164368, A164288.
Sequence in context: A198319 A124584 A074979 * A102833 A136078 A230255
Adjacent sequences: A164917 A164918 A164919 * A164921 A164922 A164923


KEYWORD

nonn,more,uned


AUTHOR

Vladimir Shevelev, Aug 31 2009


STATUS

approved



