OFFSET
1,1
COMMENTS
Apparently the Dirichlet inverse of A114006. [R. J. Mathar, Jul 15 2010]
Not multiplicative; for example a(2)*a(3) != a(6). - R. J. Mathar, Mar 31 2012
LINKS
PROG
(PARI) a(n)=if(n==1, 1, -moebius(n)); \\ Joerg Arndt, Aug 25 2014
CROSSREFS
KEYWORD
sign
AUTHOR
Jaroslav Krizek, Mar 03 2009
EXTENSIONS
Added more terms, Joerg Arndt, Aug 25 2014
STATUS
approved