A209193 Safe primes that are also highly cototient numbers.

23, 47, 59, 83, 167, 839, 2099, 5879, 6719, 23099, 27299, 180179, 414959, 420419, 628319, 660659, 840839, 1141139, 1681679, 2042039, 2277659, 4084079, 5525519, 5705699

Offset

1,1

Links

Table of n, a(n) for n=1..24.

PrimeFan, Listing of Esoteric Integer Sequences

PrimeFan, Esoteric Integer Sequences [Cached copy]

Crossrefs

A005385 intersect A100827.

Sequence in context: A052159 A097361 A073025 * A201019 A244092 A042046

Adjacent sequences: A209190 A209191 A209192 * A209194 A209195 A209196

Keyword

nonn,more

Author

N. J. A. Sloane, Mar 05 2012

Extensions

a(19)-a(24) calculated from the b-file at A100827 by Amiram Eldar, Apr 09 2020

Status

approved