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Vincenzo Librandi, Table of n, a(n) for n = 1..1000
Index entries for primes by primitive root
pr=15; Select[Prime[Range], MultiplicativeOrder[pr, # ] == #-1 &]
Sequence in context: A262688 A020585 A038943 * A119570 A018485 A097234
Adjacent sequences: A019340 A019341 A019342 * A019344 A019345 A019346
David W. Wilson