A127440 First differences of A008683.

-2, 0, 1, -1, 2, -2, 1, 0, 1, -2, 1, -1, 2, 0, -1, -1, 1, -1, 1, 1, 0, -2, 1, 0, 1, -1, 0, -1, 0, 0, 1, 1, 0, 0, -1, -1, 2, 0, -1, -1, 0, 0, 1, 0, 1, -2, 1, 0, 0, 1, -1, -1, 1, 1, -1, 1, 0, -2, 1, -1, 2, -1, 0, 1, -2, 0, 1, 1, -2, 0, 1, -1, 2, -1, 0, 1, -2, 0, 1, 0, 1, -2, 1, 1, 0, 0, -1, -1, 1, 1, -1, 1, 0, 0, -1, -1, 1, 0, 0, -1, 0, 0, 1, -1, 2

Offset: 1

Author

Gary W. Adamson, Jan 14 2007

Keywords

• sign

Comments

Average value is 0, in the sense that lim (a(1)+a(2)+...+a(n))/n = 0. - Charles R Greathouse IV, Jan 24 2013

Links

• Antti Karttunen, Table of n, a(n) for n = 1..20000

Crossrefs

Cf. A008683.

Programs

Mathematica

Array[MoebiusMu, 77] // Differences (* Jean-François Alcover, Jan 24 2013 *)

PARI

a(n)=moebius(n+1)-moebius(n) \\ Charles R Greathouse IV, Jan 24 2013

Extensions

More terms from Antti Karttunen, Oct 07 2017