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A099991
a(n) = Moebius(2n).
3
-1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 0, -1, 0, 1, 0, 1, 0, -1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, -1, 0, -1, 0, 1, 0, -1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, -1, 0, 1, 0, -1, 0, -1, 0, 1, 0, 1, 0, 0, 0, -1, 0, 1, 0, -1, 0, 1, 0, 1, 0, 0, 0, -1, 0, 1, 0, 0, 0, 1, 0, -1, 0, -1, 0, 1, 0, -1, 0, -1, 0, -1, 0, 1, 0, 0, 0, 1, 0, 1, 0, 1
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
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
Bisection of A008683. Cf. A099990.
Sequence in context: A080545 A355820 A374367 * A091069 A318608 A087003
KEYWORD
sign,easy
AUTHOR
N. J. A. Sloane, Nov 20 2004
STATUS
approved