A077824 Expansion of (1-x)^(-1)/(1-3*x-2*x^2-2*x^3).

1, 4, 15, 56, 207, 764, 2819, 10400, 38367, 141540, 522155, 1926280, 7106231, 26215564, 96711715, 356778736, 1316190767, 4855553204, 17912598619, 66081283800, 243780155047, 899328229980, 3317707567635, 12239339472960, 45152090014111, 166570364123524

Offset

0,2

Links

Table of n, a(n) for n=0..25.

Index entries for linear recurrences with constant coefficients, signature (4,-1,0,-2).

Formula

G.f.: (1-x)^(-1)/(1-3*x-2*x^2-2*x^3).

Mathematica

CoefficientList[Series[(1 - x)^(-1)/(1 - 3*x - 2*x^2 - 2*x^3), {x, 0, 30}], x] (* Wesley Ivan Hurt, May 09 2022 *)

Crossrefs

Sequence in context: A081163 A082133 A060111 * A291030 A217779 A191606

Adjacent sequences: A077821 A077822 A077823 * A077825 A077826 A077827

Keyword

nonn

Author

N. J. A. Sloane, Nov 17 2002

Status

approved