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
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Dec 12 2019
STATUS
approved