OFFSET
1,1
COMMENTS
Except for a(1) the same as A157657.
LINKS
FORMULA
a(n) = A157657(n), n>1. -- R. J. Mathar, Mar 08 2009
PROG
(PARI) a(n)=if(n>1, -moebius(n), 0) \\ Charles R Greathouse IV, Dec 19 2011
CROSSREFS
KEYWORD
sign
AUTHOR
Jaroslav Krizek, Mar 03 2009
EXTENSIONS
Added more terms, Joerg Arndt, Aug 25 2014
STATUS
approved