OFFSET
1,1
COMMENTS
Primes p such that Legendre(-13,p) = -1. - N. J. A. Sloane, Dec 26 2017
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
MAPLE
MATHEMATICA
pr=-13; Select[Prime[Range[200]], MultiplicativeOrder[pr, # ] == #-1 &]
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Apr 24 2005
STATUS
approved