A010381 Squares mod 19.

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

Offset

1,3

Links

Table of n, a(n) for n=1..10.

Mathematica

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

Prog

(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

Crossrefs

Row 19 of A096008.

Cf. A028732.

Sequence in context: A036668 A260997 A192242 * A095033 A010399 A215046

Adjacent sequences: A010378 A010379 A010380 * A010382 A010383 A010384

Keyword

nonn,fini,full

Author

N. J. A. Sloane

Status

approved