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A028779 Nonsquares mod 66. 1
2, 5, 6, 7, 8, 10, 11, 13, 14, 17, 18, 19, 20, 21, 23, 24, 26, 28, 29, 30, 32, 35, 38, 39, 40, 41, 43, 44, 46, 47, 50, 51, 52, 53, 54, 56, 57, 59, 61, 62, 63, 65 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..42.

MATHEMATICA

Complement[Range[0, 65], PowerMod[Range[66], 2, 66]] (* Alonso del Arte, Dec 22 2019 *)

PROG

for(k=0, 66, if(!issquare(Mod(k, 66)), print1(k, ", "))) \\ Hugo Pfoertner, Dec 02 2019

(Scala) (0 to 65).diff((1 to 66).map(n => (n * n) % 66)) // Alonso del Arte, Dec 22 2019

CROSSREFS

Cf. A010427.

Sequence in context: A228374 A092206 A028746 * A050007 A047579 A028726

Adjacent sequences:  A028776 A028777 A028778 * A028780 A028781 A028782

KEYWORD

nonn,fini,full,easy

AUTHOR

N. J. A. Sloane

EXTENSIONS

Incorrect term 33 removed by Alonso del Arte, Dec 01 2019

STATUS

approved

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Last modified September 28 10:48 EDT 2021. Contains 347714 sequences. (Running on oeis4.)