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A300080 Numbers n that are not prime powers, and with exactly phi(phi(n)) residues modulo n of the maximum order. 4
6, 10, 14, 15, 18, 20, 22, 26, 30, 34, 35, 38, 39, 40, 45, 46, 48, 50, 51, 52, 54, 55, 58, 60, 62, 68, 70, 74, 75, 78, 82, 85, 86, 87, 90, 94, 95, 96, 98, 100, 102, 104, 105, 106, 110, 111, 112, 115, 116, 118, 119, 120, 122, 123, 134, 135, 136, 140, 142, 143, 144, 146, 148, 150, 153, 155, 156, 158, 159, 160, 162, 164, 165, 166 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Numbers n with at least two distinct prime factors (A024619) such that A111725(n) = A010554(n).

LINKS

Table of n, a(n) for n=1..74.

CROSSREFS

Set difference of: A300064 and A000961, A300079 and A246547, A024619 and A300065.

Cf. A002322, A010554, A111725.

Sequence in context: A057714 A143907 A132982 * A069169 A230766 A231877

Adjacent sequences:  A300077 A300078 A300079 * A300081 A300082 A300083

KEYWORD

nonn

AUTHOR

Max Alekseyev, Feb 24 2018

STATUS

approved

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Last modified July 22 05:47 EDT 2019. Contains 325213 sequences. (Running on oeis4.)