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A028788 Nonsquares mod 75. 1
2, 3, 5, 7, 8, 10, 11, 12, 13, 14, 15, 17, 18, 20, 22, 23, 26, 27, 28, 29, 30, 32, 33, 35, 37, 38, 40, 41, 42, 43, 44, 45, 47, 48, 50, 52, 53, 55, 56, 57, 58, 59, 60, 62, 63, 65, 67, 68, 70, 71, 72, 73, 74 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..53.

MATHEMATICA

Complement[Range[0, 74], PowerMod[Range[75], 2, 75]] (* Alonso del Arte, Dec 25 2019 *)

PROG

(Scala) (0 to 74).diff((1 to 75).map(n => (n * n) % 75))

CROSSREFS

Cf. A010436.

Sequence in context: A152604 A302293 A266347 * A197128 A034707 A288378

Adjacent sequences:  A028785 A028786 A028787 * A028789 A028790 A028791

KEYWORD

nonn,fini,full,easy

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified April 22 22:19 EDT 2021. Contains 343197 sequences. (Running on oeis4.)