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A028765 Nonsquares mod 52. 1
2, 3, 5, 6, 7, 8, 10, 11, 14, 15, 18, 19, 20, 21, 22, 23, 24, 26, 27, 28, 30, 31, 32, 33, 34, 35, 37, 38, 39, 41, 42, 43, 44, 45, 46, 47, 50, 51 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..38.

MATHEMATICA

Complement[Range[0, 51], PowerMod[Range[52], 2, 52]] (* Alonso del Arte, Dec 26 2019 *)

PROG

(Scala) (0 to 51).diff((1 to 52).map(n => (n * n) % 52)) // Alonso del Arte, Dec 26 2019

CROSSREFS

Cf. A010413.

Sequence in context: A084116 A137620 A336487 * A181807 A059870 A179813

Adjacent sequences:  A028762 A028763 A028764 * A028766 A028767 A028768

KEYWORD

nonn,fini,full,easy

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified October 1 08:39 EDT 2020. Contains 337442 sequences. (Running on oeis4.)