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A240097 Numbers with primitive root -15. 10
2, 11, 13, 22, 26, 29, 37, 41, 43, 58, 59, 71, 73, 74, 82, 86, 89, 97, 101, 103, 118, 121, 127, 131, 142, 146, 149, 157, 163, 169, 178, 179, 191, 193, 194, 202, 206, 239, 242, 251, 254, 262, 269, 281, 298, 307, 313, 314, 326, 337, 338, 358, 359, 373, 382 (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 = -15; Select[Range[2, 500], MultiplicativeOrder[pr, #] == EulerPhi[#] &]

CROSSREFS

Cf. numbers with positive primitive root r: A167791 (r=2), A167792 (r=3), A167793 (r=5), A167794 (r=6), A167795 (r=7), A167796 (r=8), A167797 (r=10), A240028 (r=11), A240030 (r=12), A240032 (r=13), A240094 (r=14), A240096 (r=15).

Cf. numbers with negative primitive root r: A167798 (r=-2), A167799 (r=-3), A167800 (r=-4), A167801 (r=-5), A167802 (r=-6), A167803 (r=-7), A167804 (r=-8), A167805 (r=-9), A167806 (r=-10), A240029 (r=-11), A240031 (r=-12), A240093 (r=-13), A240095 (r=-14).

Sequence in context: A166561 A179462 A207192 * A018375 A274408 A045384

Adjacent sequences:  A240094 A240095 A240096 * A240098 A240099 A240100

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Apr 01 2014

STATUS

approved

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Last modified December 12 12:30 EST 2019. Contains 329958 sequences. (Running on oeis4.)