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A167805 Numbers with primitive root -9. 19
2, 4, 7, 11, 14, 19, 22, 23, 31, 38, 43, 46, 47, 49, 59, 62, 71, 79, 83, 86, 94, 98, 107, 118, 127, 131, 139, 142, 158, 163, 166, 167, 179, 191, 199, 211, 214, 223, 227, 239, 251, 254, 262, 263, 278, 283, 311, 326, 331, 334, 343, 347, 358, 359, 361, 379, 382, 383 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

MATHEMATICA

pr=-9; Select[Range[2, 2000], MultiplicativeOrder[pr, # ] == EulerPhi[ # ] &]

CROSSREFS

Cf. A105881 (primes with primitive root -9)

Sequence in context: A211372 A054850 A225154 * A027427 A306070 A262136

Adjacent sequences:  A167802 A167803 A167804 * A167806 A167807 A167808

KEYWORD

nonn

AUTHOR

T. D. Noe, Nov 12 2009

STATUS

approved

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Last modified July 14 13:27 EDT 2020. Contains 335729 sequences. (Running on oeis4.)