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Vincenzo Librandi, Table of n, a(n) for n = 1..1000
pr=-8; Select[Prime[Range], MultiplicativeOrder[pr, # ] == #-1 &]
Sequence in context: A243458 A067367 A140386 * A163587 A038922 A019367
Adjacent sequences: A105877 A105878 A105879 * A105881 A105882 A105883
N. J. A. Sloane, Apr 24 2005