A077901 Expansion of (1-x)^(-1)/(1+x-x^2-2*x^3).

1, 0, 2, 1, 2, 4, 1, 8, 2, 9, 10, 4, 25, 0, 34, 17, 18, 68, -15, 120, 2, 89, 154, -60, 393, -144, 418, 225, -94, 1156, -799, 1768, -254, 425, 2858, -2940, 6649, -3872, 4642, 4785, -7886, 21956, -20271, 26456, -2814, -11271, 61370, -78268, 117097, -72624, 33186, 128385, -240446, 435204

Offset

0,3

Links

Table of n, a(n) for n=0..53.

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

Mathematica

CoefficientList[Series[(1-x)^(-1)/(1+x-x^2-2x^3), {x, 0, 80}], x]  (* Harvey P. Dale, Mar 20 2011 *)

Prog

(PARI) Vec((1-x)^(-1)/(1+x-x^2-2*x^3)+O(x^99)) \\ Charles R Greathouse IV, Sep 27 2012

Crossrefs

First differences are in A077971.

Sequence in context: A177701 A119765 A303325 * A105619 A302212 A302460

Adjacent sequences: A077898 A077899 A077900 * A077902 A077903 A077904

Keyword

sign,easy

Author

N. J. A. Sloane, Nov 17 2002

Status

approved