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A167793 Numbers with primitive root 5. 19
2, 3, 6, 7, 9, 14, 17, 18, 23, 27, 34, 37, 43, 46, 47, 49, 53, 54, 73, 74, 81, 83, 86, 94, 97, 98, 103, 106, 107, 113, 137, 146, 157, 162, 166, 167, 173, 193, 194, 197, 206, 214, 223, 226, 227, 233, 243, 257, 263, 274, 277, 283, 289, 293, 307, 314, 317, 334, 343, 346 (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=5; Select[Range[2, 2000], MultiplicativeOrder[pr, # ] == EulerPhi[ # ] &]

CROSSREFS

Cf. A019335 (primes with primitive root 5)

Sequence in context: A246647 A177729 A049993 * A262932 A018423 A018700

Adjacent sequences:  A167790 A167791 A167792 * A167794 A167795 A167796

KEYWORD

nonn

AUTHOR

T. D. Noe, Nov 12 2009

STATUS

approved

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Last modified December 5 13:26 EST 2019. Contains 329751 sequences. (Running on oeis4.)