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A209194 Sophie Germain primes that are also highly cototient numbers. 0
2, 23, 83, 89, 113, 419, 509, 659, 1049, 1889, 3359, 4409, 9029, 10709, 11549, 13649, 20789, 23099, 57329, 84629, 90089, 113189, 115499, 207479, 210209, 270269, 314159, 324869, 330329, 420419, 570569, 658349, 660659, 810809, 840839, 1021019, 1138829 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..37.

PrimeFan, Listing of Esoteric Integer Sequences

FORMULA

A005384 INTERSECT A100827.

CROSSREFS

Cf. A100827.

Sequence in context: A226490 A217113 A042679 * A097232 A222564 A099134

Adjacent sequences:  A209191 A209192 A209193 * A209195 A209196 A209197

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Mar 05 2012

STATUS

approved

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Last modified October 22 22:22 EDT 2020. Contains 337962 sequences. (Running on oeis4.)