A158567 First differences of A157680.

-1, 0, -1, -6, 4, 1, 0, -1, 0, -1, 4, -6, 1, 4, 0, -1, 0, -1, 4, -6, 1, 0, -1, 0, -1, 4, -6, 1, 4, 4, -6, 1, 4, -6, 4, 1, 1, 1, 0, -1, 0, -1, -6, 4, 1, 0, -1, 0, -1, 4, -6, 1, 4, 0, -1, 0, -1, 4, -6, 1, 0, -1, 0, -1, 4, -6, 1, 4, 4, -6, 1, 4, -6, 4, 1, 1, 1, -9, 9, 0, -1, -6, 4, 1, 0, -1, 0, -1, 4

Offset: 1

Author

Paul Curtz, Mar 21 2009

Keywords

• sign
• base
• less

Crossrefs

Cf. A157680, A157644.

Formula

a(n) = A157680(n+1)-A157680(n).

Extensions

Edited and extended by R. J. Mathar, Apr 08 2009