%I #5 Aug 20 2021 13:28:46
%S 1,-3,6,-10,14,-16,12,4,-40,104,-200,320,-432,464,-288,-288,1504,
%T -3584,6592,-10176,13184,-13184,6016,14336,-55040,122112,-215552,
%U 321024,-397824,364544,-87040,-621568,1972224,-4118528,6993920,-10043392,11849728,-9711616,-663552,25026560
%N Expansion of (1-x)/(1+2*x-2*x^3).
%H <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (-2,0,2).
%t CoefficientList[Series[(1-x)/(1+2x-2x^3),{x,0,60}],x] (* or *) LinearRecurrence[{-2,0,2},{1,-3,6},60] (* _Harvey P. Dale_, Aug 20 2021 *)
%K sign
%O 0,2
%A _N. J. A. Sloane_, Nov 17 2002