login
A092152
Sign of A092673(n).
1
1, -1, -1, 1, -1, 1, -1, 0, 0, 1, -1, -1, -1, 1, 1, 0, -1, 0, -1, -1, 1, 1, -1, 0, 0, 1, 0, -1, -1, -1, -1, 0, 1, 1, 1, 0, -1, 1, 1, 0, -1, -1, -1, -1, 0, 1, -1, 0, 0, 0, 1, -1, -1, 0, 1, 0, 1, 1, -1, 1, -1, 1, 0, 0, 1, -1, -1, -1, 1, -1, -1, 0, -1, 1, 0, -1, 1, -1, -1, 0, 0, 1, -1, 1, 1, 1, 1, 0, -1, 0, 1, -1, 1, 1, 1, 0, -1, 0, 0, 0, -1, -1, -1, 0, -1, 1
OFFSET
1,1
COMMENTS
Multiplicative because A092673 is. - Andrew Howroyd, Jul 27 2018
LINKS
FORMULA
a(2*n) = sign(mu(2*n) - mu(n)); a(2*n + 1) = mu(2*n + 1). - Andrew Howroyd, Jul 27 2018
PROG
(PARI) a(n)=sign(moebius(n) - if(n%2, 0, moebius(n/2))) \\ Andrew Howroyd, Jul 27 2018
CROSSREFS
Cf. A092673.
Sequence in context: A117947 A175860 A351956 * A350070 A359834 A179775
KEYWORD
sign,mult
AUTHOR
Jon Perry, Mar 31 2004
STATUS
approved