OFFSET
1,1
COMMENTS
The old definition was mobius(mobius(n)). The reason for this sequence was that in some ancient version of Maple the command "with(numtheory): A010555 := n->mobius(mobius(n));" worked. But it no longer works, so the definition has been changed.
CROSSREFS
KEYWORD
sign,easy
AUTHOR
EXTENSIONS
Definition changed by N. J. A. Sloane, Jan 15 2019
STATUS
approved