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 A337868 Number of distinct residues of x^r (mod n), x=0..n-1, r=2, ..., n. 0
 0, 2, 3, 3, 5, 6, 7, 6, 7, 10, 11, 9, 13, 14, 15, 11, 17, 14, 19, 15, 21, 22, 23, 17, 21, 26, 20, 21, 29, 30, 31, 21, 33, 34, 35, 21, 37, 38, 39, 28, 41, 42, 43, 33, 35, 46, 47, 32, 43, 42, 51, 39, 53, 40, 55, 39, 57, 58, 59, 45, 61, 62, 49, 41, 65, 66, 67, 51, 69, 70, 71 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS MATHEMATICA T[n_] := Union@Mod[Flatten@Table[Range[n]^i, {i, 2, n}], n]; Table[Length[T@n], {n, 1, 144}] CROSSREFS For number of k-th power residues mod n, see A000224 (k=2), A052273 (k=4), A052274 (k=5), A052275 (k=6), A085310 (k=7), A085311 (k=8), A085312 (k=9), A085313 (k=10), A085314 (k=12), A228849 (k=13). Sequence in context: A097247 A097246 A277886 * A063659 A255563 A331288 Adjacent sequences:  A337865 A337866 A337867 * A337869 A337870 A337871 KEYWORD nonn AUTHOR José María Grau Ribas, Sep 27 2020 STATUS approved

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Last modified December 3 15:34 EST 2021. Contains 349463 sequences. (Running on oeis4.)