A010401 Squares mod 40.

0, 1, 4, 9, 16, 20, 24, 25, 36

Offset

1,3

Links

Table of n, a(n) for n=1..9.

Mathematica

Union[PowerMod[Range[40], 2, 40]] (* Vincenzo Librandi, Dec 27 2019 *)

Prog

(Sage) [quadratic_residues(40)] # Zerinvary Lajos, May 24 2009
(Scala) (1 to 40).map(n => n * n % 40).toSet.toSeq.sorted // Alonso del Arte, Feb 20 2020

Crossrefs

Cf. A028753.

Sequence in context: A313328 A313329 A313330 * A313331 A313332 A313333

Adjacent sequences: A010398 A010399 A010400 * A010402 A010403 A010404

Keyword

nonn,fini,full,easy

Author

N. J. A. Sloane

Status

approved