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A167802
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Numbers with primitive root -6.
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19
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13, 17, 19, 23, 41, 47, 61, 67, 71, 89, 109, 113, 137, 157, 167, 169, 211, 229, 233, 257, 263, 277, 283, 289, 331, 359, 361, 373, 383, 397, 401, 449, 479, 503, 521, 523, 529, 547, 569, 593, 599, 613, 619, 641, 647, 661, 691, 709, 719, 733, 739, 743, 757, 761
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OFFSET
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1,1
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LINKS
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Vincenzo Librandi, Table of n, a(n) for n = 1..1000
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MATHEMATICA
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pr=-6; Select[Range[2, 2000], MultiplicativeOrder[pr, # ] == EulerPhi[ # ] &]
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PROG
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(PARI) is(n)=gcd(n, 6)==1 && znorder(Mod(-6, n))==eulerphi(n) && n>1 \\ Charles R Greathouse IV, Feb 23 2017
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CROSSREFS
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Cf. A105878 (primes with primitive root -6)
Sequence in context: A214033 A268593 A175873 * A105878 A054476 A319504
Adjacent sequences: A167799 A167800 A167801 * A167803 A167804 A167805
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KEYWORD
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nonn
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AUTHOR
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T. D. Noe, Nov 12 2009
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STATUS
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approved
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