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%I #7 Jul 31 2015 12:10:39
%S 1,-1,3,-3,5,-3,1,9,-23,49,-79,113,-127,97,33,-319,833,-1599,2561,
%T -3455,3713,-2303,-2303,12033,-28671,52737,-81407,105473,-105471,
%U 48129,114689,-440319,976897,-1724415,2568193,-3182591,2916353,-696319,-4972543,15777793,-32948223,55951361
%N Expansion of (1-x)^(-1)/(1+2*x-2*x^3).
%H <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (-1, 2, 2, -2).
%F 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
%t 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 *)
%K sign
%O 0,3
%A _N. J. A. Sloane_, Nov 17 2002
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