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Vincenzo Librandi, Table of n, a(n) for n = 1..1000
Index entries for primes by primitive root
pr=13; Select[Prime[Range], MultiplicativeOrder[pr, # ] == #-1 &]
Sequence in context: A258031 A160536 A024979 * A084572 A040105 A156768
Adjacent sequences: A019338 A019339 A019340 * A019342 A019343 A019344
David W. Wilson