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 A327960 Dirichlet g.f.: 1 / (zeta(s) * zeta(s-1)^2). 1
 1, -5, -7, 8, -11, 35, -15, -4, 15, 55, -23, -56, -27, 75, 77, 0, -35, -75, -39, -88, 105, 115, -47, 28, 35, 135, -9, -120, -59, -385, -63, 0, 161, 175, 165, 120, -75, 195, 189, 44, -83, -525, -87, -184, -165, 235, -95, 0, 63, -175, 245, -216, -107, 45, 253, 60, 273, 295, -119, 616 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Dirichlet inverse of A060640. Moebius transform applied twice to A101035. LINKS Amiram Eldar, Table of n, a(n) for n = 1..10000 FORMULA a(1) = 1; a(n) = -Sum_{d|n, d3, 0]; a[1] = 1; a[n_] := Times @@ (f @@@ FactorInteger[n]); Array[a, 100] (* Amiram Eldar, Dec 02 2020 *) CROSSREFS Cf. A046101 (positions of 0's), A046692, A055615, A060640, A101035. Sequence in context: A154370 A045251 A099497 * A347127 A061813 A173664 Adjacent sequences:  A327957 A327958 A327959 * A327961 A327962 A327963 KEYWORD sign,mult AUTHOR Ilya Gutkovskiy, Oct 22 2019 STATUS approved

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Last modified September 22 02:38 EDT 2021. Contains 347605 sequences. (Running on oeis4.)