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 A308481 a(n) = Sum_{k=1..n, gcd(n,k) = 1} k^n. 3
 1, 1, 9, 82, 1300, 15626, 376761, 6161988, 176787117, 3769318700, 142364319625, 3152513804548, 154718778284148, 4340009120036086, 210971169748692000, 7281661100510001416, 435659030617933827136, 14181101408561469791694, 1052864393300587929716721, 41673894815421072916530408 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS Seiichi Manyama, Table of n, a(n) for n = 1..386 MATHEMATICA a[n_] := Sum[If[GCD[n, k] == 1, k^n, 0], {k, 1, n}]; Table[a[n], {n, 1, 20}] PROG (PARI) a(n) = sum(k=1, n, (gcd(n, k)==1)*k^n) \\ Felix FrÃ¶hlich, May 30 2019 CROSSREFS First super-diagonal of A308477. Cf. A031971. Sequence in context: A294645 A338663 A308668 * A041146 A320991 A015497 Adjacent sequences:  A308478 A308479 A308480 * A308482 A308483 A308484 KEYWORD nonn AUTHOR Ilya Gutkovskiy, May 30 2019 STATUS approved

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Last modified August 11 03:41 EDT 2022. Contains 356046 sequences. (Running on oeis4.)