A330323 a(n) = Moebius(n)*Moebius(n+1).

-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

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