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 A028797 Nonsquares mod 84. 1
 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 17, 18, 19, 20, 22, 23, 24, 26, 27, 29, 30, 31, 32, 33, 34, 35, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 50, 51, 52, 53, 54, 55, 56, 58, 59, 61, 62, 63, 65, 66, 67, 68, 69, 70, 71, 73, 74, 75, 76, 77, 78, 79, 80, 82, 83 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..68. MATHEMATICA Complement[Range[0, 83], PowerMod[Range[84], 2, 84]] (* Alonso del Arte, Dec 21 2019 *) PROG (Scala) (0 to 83).diff((1 to 84).map(n => (n * n) % 84)) // Alonso del Arte, Dec 21 2019 CROSSREFS Cf. A010445. Sequence in context: A028812 A039251 A283296 * A028773 A028813 A158276 Adjacent sequences: A028794 A028795 A028796 * A028798 A028799 A028800 KEYWORD nonn,fini,full,easy AUTHOR N. J. A. Sloane STATUS approved

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Last modified September 13 08:33 EDT 2024. Contains 375902 sequences. (Running on oeis4.)