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A122518 G.f.: 1/(1 -2 x^3 - x^4 + x^5) 0
1, 0, 0, 2, 1, -1, 4, 4, -3, 6, 13, -6, 5, 35, -5, -9, 81, 20, -58, 158, 130, -177, 238, 476, -382, 169, 1367, -526, -520, 3285, 146, -2933, 6576, 4097, -9005, 10073, 17703, -20489, 7044, 54484, -33348, -24104, 136501, -19256, -136040, 282246, 122093, -427837, 447708, 662472 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

COMMENTS

Based on characteristic polynomial x^5 - 2x^2 - x + 1.

LINKS

Table of n, a(n) for n=0..49.

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

MATHEMATICA

p[x_] := x^5 - 2x^2 - x + 1 q[x_] := ExpandAll[x^5*p[1/x]] Table[ SeriesCoefficient[ Series[x/q[x], {x, 0, 50}], n], {n, 0, 50}]

CROSSREFS

Cf. A006054, A006053.

Sequence in context: A322115 A294217 A123246 * A129704 A144460 A222541

Adjacent sequences:  A122515 A122516 A122517 * A122519 A122520 A122521

KEYWORD

sign,easy

AUTHOR

Roger L. Bagula, Sep 16 2006

EXTENSIONS

Edited by N. J. A. Sloane, Oct 01 2006

STATUS

approved

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Last modified August 8 05:50 EDT 2020. Contains 336290 sequences. (Running on oeis4.)