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A252801
Primes whose trajectories under the map x -> A039951(x) enter the cycle {2, 1093}.
7
2, 5, 7, 13, 17, 23, 29, 31, 37, 41, 43
OFFSET
1,1
EXAMPLE
The trajectory of 31 under the given map starts 31, 7, 5, 2, 1093, 2, 1093, ..., entering the given cycle, so 31 is a term of the sequence.
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Felix Fröhlich, Dec 22 2014
EXTENSIONS
Name edited by Felix Fröhlich, Jun 19 2021
STATUS
approved