OFFSET
1,1
COMMENTS
b(n) = -a(n) is multiplicative with b(2^e) = 0, b(p) = -1 if p >= 3, 0 otherwise. - David W. Wilson, Jun 12 2005
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..10000
FORMULA
a(n) = A008683(2n). - Wesley Ivan Hurt, Dec 17 2013
MAPLE
with(numtheory); A099991:=n->mobius(2*n); seq(A099991(n), n=1..100); # Wesley Ivan Hurt, Dec 17 2013
MATHEMATICA
MoebiusMu[2*Range[110]] (* Harvey P. Dale, Jul 13 2012 *)
PROG
(PARI) A099991(n) = moebius(2*n); \\ Antti Karttunen, Sep 14 2017
CROSSREFS
KEYWORD
sign,easy
AUTHOR
N. J. A. Sloane, Nov 20 2004
STATUS
approved