A010430 Squares mod 69.

0, 1, 3, 4, 6, 9, 12, 13, 16, 18, 24, 25, 27, 31, 36, 39, 46, 48, 49, 52, 54, 55, 58, 64

Offset

1,3

Links

Table of n, a(n) for n=1..24.

Mathematica

Union[PowerMod[Range[69], 2, 69]] (* Alonso del Arte, Dec 23 2019 *)

Prog

(Sage) [quadratic_residues(69)] # Zerinvary Lajos, May 24 2009
(Scala) (1 to 69).map(n => (n * n) % 69).toSet.toSeq.sorted // Alonso del Arte, Dec 23 2019

Crossrefs

Cf. A028782.

Sequence in context: A118098 A367477 A022297 * A191287 A353983 A260109

Adjacent sequences: A010427 A010428 A010429 * A010431 A010432 A010433

Keyword

nonn,fini,full,easy

Author

N. J. A. Sloane

Status

approved