A010392 Squares mod 31.

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

Offset

1,3

Links

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

Mathematica

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

Prog

(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

Crossrefs

Row 31 of A096008.

Cf. A010423, A028744.

Sequence in context: A173025 A203463 A223909 * A095042 A010423 A035235

Adjacent sequences: A010389 A010390 A010391 * A010393 A010394 A010395

Keyword

nonn,fini,full,easy

Author

N. J. A. Sloane

Status

approved