OFFSET
1,3
MATHEMATICA
Union[Mod[Range[84]^2, 84]] (* Harvey P. Dale, Jan 09 2011 *)
PROG
(Sage) [quadratic_residues(84)] # Zerinvary Lajos, May 28 2009
(Scala) (1 to 84).map(n => (n * n) % 84).toSet.toSeq.sorted // Alonso del Arte, Dec 21 2019
CROSSREFS
KEYWORD
nonn,fini,full,easy
AUTHOR
STATUS
approved