OFFSET
1,3
MATHEMATICA
Union[PowerMod[Range[91], 2, 91]] (* Alonso del Arte, Jan 07 2020 *)
PROG
(Sage) [quadratic_residues(91)] # Zerinvary Lajos, May 28 2009
(Scala) (1 to 91).map(n => n * n % 91).toSet.toSeq.sorted // Alonso del Arte, Jan 13 2020
CROSSREFS
KEYWORD
nonn,fini,full,easy
AUTHOR
STATUS
approved