A010392 Squares mod 31.

0, 1, 2, 4, 5, 7, 8, 9, 10, 14, 16, 18, 19, 20, 25, 28

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn
• fini
• full
• easy

Crossrefs

Row 31 of A096008.

Cf. A010423, A028744.

Programs

Mathematica

Union[PowerMod[Range[31], 2, 31]] (* Alonso del Arte, Dec 31 2019 *)

Sage

[quadratic_residues(31)] # Zerinvary Lajos, May 24 2009

Scala

(1 to 31).map(n => n * n % 31).toSet.toSeq.sorted // Alonso del Arte, Dec 31 2019