A158926 First differences of A158916.

0, 0, 0, -9, 27, -54, 99, -189, 378, -765, 1539, -3078, 6147, -12285, 24570, -49149, 98307, -196614, 393219, -786429, 1572858, -3145725, 6291459, -12582918, 25165827, -50331645, 100663290, -201326589, 402653187, -805306374, 1610612739, -3221225469, 6442450938

Offset: 0

Author

Paul Curtz, Mar 31 2009

Keywords

• sign
• easy

Links

• Index entries for linear recurrences with constant coefficients, signature (-3, -3, -2).

Formula

a(n) = -3a(n-1)-3a(n-2)-2a(n-3), n > 3.

a(n) = 9*(-1)^n*A024495(n+1) .

G.f.: -9*x^3/((2*x+1)*(1+x+x^2)). - R. J. Mathar, Apr 08 2009

Extensions

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