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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

%I

%S 113,139,199,211,223,277,293,397,421,443

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

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

%H V. Shevelev, <a href="https://arxiv.org/abs/0908.2319">On critical small intervals containing primes</a>, arXiv:0908.2319 [math.NT], 2009.

%e 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.

%Y Cf. A006992, A164917, A164918, A104272, A164368, A164288.

%K nonn,more,uned

%O 1,1

%A _Vladimir Shevelev_, Aug 31 2009

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Last modified May 27 12:45 EDT 2020. Contains 334657 sequences. (Running on oeis4.)