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A167800 Numbers with primitive root -4. 19
3, 7, 9, 11, 19, 23, 27, 47, 49, 59, 67, 71, 79, 81, 83, 103, 107, 121, 131, 139, 163, 167, 179, 191, 199, 211, 227, 239, 243, 263, 271, 311, 343, 347, 359, 361, 367, 379, 383, 419, 443, 463, 467, 479, 487, 491, 503, 523, 529, 547, 563, 587, 599, 607, 619, 647 (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=-4; Select[Range[2, 2000], MultiplicativeOrder[pr, # ] == EulerPhi[ # ] &]

CROSSREFS

Cf. A105876 (primes with primitive root -4)

Sequence in context: A004614 A112398 A197504 * A270834 A192628 A003538

Adjacent sequences:  A167797 A167798 A167799 * A167801 A167802 A167803

KEYWORD

nonn

AUTHOR

T. D. Noe, Nov 12 2009

STATUS

approved

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Last modified July 22 10:03 EDT 2019. Contains 325219 sequences. (Running on oeis4.)