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A077924 Expansion of (1-x)^(-1)/(1+2*x-2*x^3). 0
1, -1, 3, -3, 5, -3, 1, 9, -23, 49, -79, 113, -127, 97, 33, -319, 833, -1599, 2561, -3455, 3713, -2303, -2303, 12033, -28671, 52737, -81407, 105473, -105471, 48129, 114689, -440319, 976897, -1724415, 2568193, -3182591, 2916353, -696319, -4972543, 15777793, -32948223, 55951361 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
FORMULA
a(0)=1, a(1)=-1, a(2)=3, a(3)=-3, a(n)=a(n-1)+2*a(n-2)+ 2*a(n-3)- 2*a(n-4) -- From Harvey P. Dale, Jul 25 2012
MATHEMATICA
CoefficientList[Series[(1-x)^(-1)/(1+2x-2x^3), {x, 0, 50}], x] (* or *) LinearRecurrence[{-1, 2, 2, -2}, {1, -1, 3, -3}, 50] (* Harvey P. Dale, Jul 25 2012 *)
CROSSREFS
Sequence in context: A115155 A136549 A302141 * A003569 A333596 A066670
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Nov 17 2002
STATUS
approved

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Last modified March 29 01:36 EDT 2024. Contains 371264 sequences. (Running on oeis4.)