A209193 - OEIS

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A209193

Safe primes that are also highly cototient numbers.

0

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

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OFFSET

1,1

LINKS

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

PrimeFan, Listing of Esoteric Integer Sequences

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