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Vincenzo Librandi, Table of n, a(n) for n = 1..1000
Index entries for primes by primitive root
pr=40; Select[Prime[Range], MultiplicativeOrder[pr, # ] == #-1 &]
Sequence in context: A034849 A106070 A038880 * A191055 A078497 A256567
Adjacent sequences: A019362 A019363 A019364 * A019366 A019367 A019368
David W. Wilson