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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
OFFSET
1,1
FORMULA
A005384 INTERSECT A100827.
CROSSREFS
Cf. A100827.
Sequence in context: A042679 A354691 A345701 * A097232 A339474 A222564
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Mar 05 2012
STATUS
approved