A137426 a(n)=-a(n-1)+2a(n-3).

0, 1, -3, 3, -1, -5, 11, -13, 3, 19, -45, 51, -13, -77, 179, -205, 51, 307, -717, 819, -205, -1229, 2867, -3277, 819, 4915, -11469, 13107, -3277, -19661, 45875, -52429, 13107, 78643, -183501, 209715, -52429, -314573, 734003, -838861, 209715, 1258291

Offset

0,3

Links

Table of n, a(n) for n=0..41.

Index entries for linear recurrences with constant coefficients, signature (-1, 0, 2).

Formula

G.f.: (2*x^2-x)/(2*x^3-x-1). - Harvey P. Dale, Dec 03 2012

Mathematica

LinearRecurrence[{-1, 0, 2}, {0, 1, -3}, 80] (* Harvey P. Dale, Dec 03 2012 *)

Crossrefs

Sequence in context: A071945 A209583 A144944 * A269949 A074456 A016454

Adjacent sequences: A137423 A137424 A137425 * A137427 A137428 A137429

Keyword

sign

Author

Paul Curtz, Apr 17 2008

Extensions

More terms from Harvey P. Dale, Dec 03 2012

Status

approved