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A343910
a(n) = mu(phi(n)), where mu is the Möbius function and phi is the Euler totient function.
0
1, 1, -1, -1, 0, -1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 1, 1, 0, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, -1, 0, 0, 0, 0, -1, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 1, 0, 0, -1, 0, 0, 0, 0
OFFSET
1
FORMULA
a(n) = A008683(A000010(n)).
MATHEMATICA
Table[MoebiusMu[EulerPhi[n]], {n, 100}]
CROSSREFS
Cf. A000010 (phi), A008683 (mu).
Sequence in context: A114000 A131218 A174391 * A329682 A113998 A253084
KEYWORD
sign
AUTHOR
Wesley Ivan Hurt, May 03 2021
STATUS
approved