A164920 Primes which are obtained at least by two ways using the iterations of the Bertrand operator (see A164917) beginning with primes of A164368.

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

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