OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
MATHEMATICA
pr=13; Select[Prime[Range[200]], MultiplicativeOrder[pr, # ] == #-1 &]
Join[{2, 5, 11}, Select[Prime[Range[200]], PrimitiveRoot[#, 13]==13&]] (* Harvey P. Dale, Sep 26 2020 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved