A010381 Squares mod 19.

0, 1, 4, 5, 6, 7, 9, 11, 16, 17

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn
• fini
• full

Crossrefs

Row 19 of A096008.

Cf. A028732.

Programs

Mathematica

Union[PowerMod[Range[19], 2, 19]] (* Alonso del Arte, Dec 19 2019 *)

Sage

[quadratic_residues(19)] # Zerinvary Lajos, May 24 2009

Scala

(1 to 19).map(n => (n * n) % 19).toSet.toSeq.sorted // Alonso del Arte, Dec 19 2019