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A078011 Expansion of (1-x)/(1-x-x^2+2*x^3). 0
1, 0, 1, -1, 0, -3, -1, -4, 1, -1, 8, 5, 15, 4, 9, -17, -16, -51, -33, -52, 17, 31, 152, 149, 239, 84, 25, -369, -512, -931, -705, -612, 545, 1343, 3112, 3365, 3791, 932, -2007, -8657, -12528, -17171, -12385, -4500, 17457, 37727, 64184, 66997, 55727, -5644, -83911, -201009, -273632, -306819 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,6

LINKS

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

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

FORMULA

a(0)=1, a(1)=0, a(2)=1, a(n)=a(n-1)+a(n-2)-2*a(n-3). - Harvey P. Dale, May 04 2013

a(n) = A077948(n)-A077948(n-1). - R. J. Mathar, Nov 07 2015

MATHEMATICA

CoefficientList[Series[(1-x)/(1-x-x^2+2x^3), {x, 0, 60}], x] (* or *) LinearRecurrence[ {1, 1, -2}, {1, 0, 1}, 60] (* Harvey P. Dale, May 04 2013 *)

CROSSREFS

Sequence in context: A127057 A143355 A143319 * A010285 A159878 A230767

Adjacent sequences:  A078008 A078009 A078010 * A078012 A078013 A078014

KEYWORD

sign,easy

AUTHOR

N. J. A. Sloane, Nov 17 2002

STATUS

approved

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Last modified January 17 14:12 EST 2019. Contains 319225 sequences. (Running on oeis4.)