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A028766 Nonsquares mod 53. 1
2, 3, 5, 8, 12, 14, 18, 19, 20, 21, 22, 23, 26, 27, 30, 31, 32, 33, 34, 35, 39, 41, 45, 48, 50, 51 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..26.

MATHEMATICA

Complement[Range[0, 52], PowerMod[Range[53], 2, 53]] (* Alonso del Arte, May 03 2020 *)

PROG

(Scala) (0 to 52).diff((1 to 53).map(n => n * n % 53)) // Alonso del Arte, May 03 2020

CROSSREFS

Cf. A010414.

Sequence in context: A067288 A308075 A211181 * A022487 A305377 A062489

Adjacent sequences:  A028763 A028764 A028765 * A028767 A028768 A028769

KEYWORD

nonn,fini,full,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified March 7 14:00 EST 2021. Contains 341886 sequences. (Running on oeis4.)