A092152 Sign of A092673(n).

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

Antti Karttunen, Table of n, a(n) for n = 1..10000

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

Adjacent sequences: A092149 A092150 A092151 * A092153 A092154 A092155

Keyword

sign,mult

Author

Jon Perry, Mar 31 2004

Status

approved