A105890 - OEIS

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A105890

Primes for which -18 is a primitive root.

1

5, 7, 23, 29, 31, 37, 47, 53, 61, 71, 101, 103, 109, 127, 149, 151, 157, 167, 173, 181, 191, 197, 223, 239, 263, 269, 271, 277, 293, 317, 349, 359, 367, 383, 389, 397, 421, 461, 479, 503, 509, 541, 557, 607, 613, 647, 653, 661, 677, 701, 719, 733, 743, 751, 757, 773, 797

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OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Index entries for primes by primitive root

MATHEMATICA

pr=-18; Select[Prime[Range[200]], MultiplicativeOrder[pr, # ] == #-1 &]

CROSSREFS

Sequence in context: A260658 A028281 A240102 * A329625 A018656 A214520

Adjacent sequences: A105887 A105888 A105889 * A105891 A105892 A105893

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Apr 24 2005

STATUS

approved