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 A330323 a(n) = Moebius(n)*Moebius(n+1). 2
 -1, 1, 0, 0, -1, -1, 0, 0, 0, -1, 0, 0, -1, 1, 0, 0, 0, 0, 0, 0, 1, -1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, -1, 1, 0, 0, 1, 1, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, -1, 0, 0, -1, 0, 0, 0, -1, 1, 0, 0, -1, 1, 0, 0, -1, 0, 0, 0, -1, 1, 0, 0, 0, -1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1 LINKS Amiram Eldar, Table of n, a(n) for n = 1..10000 FORMULA a(n) = A008683(n * (n+1)). - Christian Krause, Apr 17 2021 MATHEMATICA Table[MoebiusMu[n] MoebiusMu[n + 1], {n, 100}] (* Wesley Ivan Hurt, Apr 19 2021 *) PROG (PARI) a(n) = moebius(n*(n+1)); \\ Michel Marcus, Apr 19 2021 CROSSREFS Cf. A002378, A008683 (Moebius function), A330324. Cf. A007674 (positions of nonzero terms). Sequence in context: A214284 A361466 A191747 * A280933 A133081 A352573 Adjacent sequences: A330320 A330321 A330322 * A330324 A330325 A330326 KEYWORD sign AUTHOR N. J. A. Sloane, Dec 12 2019 STATUS approved

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Last modified March 29 22:15 EDT 2023. Contains 361599 sequences. (Running on oeis4.)