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 A028800 Nonsquares mod 87. 1
 2, 3, 5, 8, 10, 11, 12, 14, 15, 17, 18, 19, 20, 21, 23, 26, 27, 29, 31, 32, 35, 37, 38, 39, 40, 41, 43, 44, 46, 47, 48, 50, 53, 55, 56, 59, 60, 61, 62, 65, 66, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 79, 80, 83, 84, 85, 86 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..57. MATHEMATICA Complement[Range[0, 86], PowerMod[Range[87], 2, 87]] (* Alonso del Arte, Dec 29 2019 *) PROG (Scala) (0 to 86).diff((1 to 87).map(n => n * n % 87)) // Alonso del Arte, Dec 29 2019 (Magma) [n: n in [0..86] | not IsSquare(R! n) where R:= ResidueClassRing(87)]; // Vincenzo Librandi, Dec 30 2019 CROSSREFS Cf. A010448. Sequence in context: A028770 A321702 A351876 * A028841 A028840 A189143 Adjacent sequences: A028797 A028798 A028799 * A028801 A028802 A028803 KEYWORD nonn,fini,full,easy AUTHOR N. J. A. Sloane STATUS approved

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Last modified August 10 13:41 EDT 2024. Contains 375056 sequences. (Running on oeis4.)