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A240028 Numbers with primitive root 11. 18
2, 3, 4, 6, 9, 13, 17, 18, 23, 26, 27, 29, 31, 34, 41, 46, 47, 54, 58, 59, 62, 67, 71, 73, 81, 82, 94, 101, 103, 109, 118, 134, 142, 146, 149, 162, 163, 169, 173, 179, 197, 202, 206, 218, 223, 233, 243, 251, 277, 281, 289, 293, 298, 326, 331, 338, 346, 358 (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 = 11; Select[Range[2, 400], 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).

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).

Sequence in context: A056751 A189035 A137446 * A097557 A175848 A240079

Adjacent sequences:  A240025 A240026 A240027 * A240029 A240030 A240031

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Mar 31 2014

STATUS

approved

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Last modified July 15 04:00 EDT 2020. Contains 335762 sequences. (Running on oeis4.)