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Vincenzo Librandi, Table of n, a(n) for n = 1..1000
Index entries for primes by primitive root
pr=60; Select[Prime[Range], MultiplicativeOrder[pr, # ] == #-1 &]
Sequence in context: A151768 A076056 A068654 * A088987 A168144 A217281
Adjacent sequences: A019381 A019382 A019383 * A019385 A019386 A019387
David W. Wilson