A252802 Primes whose trajectory under the map x -> A039951(x) enters the cycle {3, 11, 71}.

3, 11, 19

Offset

1,1

Comments

From Felix Fröhlich, Jul 01 2021: (Start)

Further terms in the sequence are 71, 107, 127, 139, 167, 179, etc. The smallest prime where it is unknown whether it is in this sequence (or in A252801 or A252812) is 47.

Is A000040 the union of this sequence, A252801 and A252812? (End)

Links

Table of n, a(n) for n=1..3.

Example

The trajectory of 19 under the given map starts 19, 3, 11, 71, 3, ..., entering the given cycle, so 19 is a term of the sequence.

Crossrefs

Cf. A000040, A039951, A244550, A252801, A252812.

Sequence in context: A228470 A246453 A117769 * A030377 A092060 A071916

Adjacent sequences: A252799 A252800 A252801 * A252803 A252804 A252805

Keyword

nonn,hard,more,bref

Author

Felix Fröhlich, Dec 22 2014

Extensions

Name edited by Felix Fröhlich, Jun 19 2021

Status

approved