A010445 Squares mod 84.

0, 1, 4, 9, 16, 21, 25, 28, 36, 37, 49, 57, 60, 64, 72, 81

Offset

1,3

Links

Table of n, a(n) for n=1..16.

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

Cf. A028797.

Sequence in context: A010461 A010421 A286069 * A155570 A313341 A313342

Adjacent sequences: A010442 A010443 A010444 * A010446 A010447 A010448

Keyword

nonn,fini,full,easy

Author

N. J. A. Sloane

Status

approved