A077907 Expansion of (1-x)^(-1)/(1+x+x^2-2*x^3).

1, 0, 0, 3, -2, 0, 9, -12, 4, 27, -54, 36, 73, -216, 216, 147, -794, 1080, 9, -2676, 4828, -2133, -8046, 19836, -16055, -19872, 75600, -87837, -27506, 266544, -414711, 93156, 854644, -1777221, 1108890, 2377620, -7040951, 6881112, 4915080, -25878093, 34725238, 983016, -87464439

Offset

0,4

Links

Harvey P. Dale, Table of n, a(n) for n = 0..1000

Index entries for linear recurrences with constant coefficients, signature (0,0,3,-2).

Mathematica

CoefficientList[Series[(1-x)^(-1)/(1+x+x^2-2x^3), {x, 0, 50}], x] (* Harvey P. Dale, Mar 03 2026 *)
(* Alternative: *)
LinearRecurrence[{0, 0, 3, -2}, {1, 0, 0, 3}, 50] (* Harvey P. Dale, Mar 03 2026 *)

Crossrefs

Sequence in context: A152441 A248181 A229728 * A355360 A067346 A360282

Adjacent sequences: A077904 A077905 A077906 * A077908 A077909 A077910

Keyword

sign,easy,changed

Author

N. J. A. Sloane, Nov 17 2002

Status

approved