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Vincenzo Librandi, Table of n, a(n) for n = 1..1000
Index entries for primes by primitive root
pr=50; Select[Prime[Range], MultiplicativeOrder[pr, # ] == #-1 &]
Sequence in context: A168164 A270543 A213697 * A033680 A032917 A006559
Adjacent sequences: A019371 A019372 A019373 * A019375 A019376 A019377
David W. Wilson