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Vincenzo Librandi, Table of n, a(n) for n = 1..1000
Index entries for primes by primitive root
pr=22; Select[Prime[Range], MultiplicativeOrder[pr, # ] == #-1 &]
Sequence in context: A167915 A019373 A140568 * A226627 A124873 A129745
Adjacent sequences: A019346 A019347 A019348 * A019350 A019351 A019352
David W. Wilson