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%I #10 Jun 13 2015 00:50:48
%S 1,-1,5,-9,27,-61,159,-385,967,-2385,5935,-14705,36511,-90561,224735,
%T -557569,1383487,-3432641,8517119,-21132545,52434047,-130098945,
%U 322800895,-800931585,1987267071,-4930795521,12234262015,-30355580929,75318094847,-186878827521,463682682879
%N Expansion of 1/((1-x)*(1+2*x-2*x^2-2*x^3)).
%H <a href="/index/Rec">Index entries for linear recurrences with constant coefficients</a>, signature (-1,4,0,-2).
%o (PARI) Vec(1/((1-x)*(1+2*x-2*x^2-2*x^3))+O(x^99)) \\ _Charles R Greathouse IV_, Sep 27 2012
%K sign,easy
%O 0,3
%A _N. J. A. Sloane_, Nov 17 2002
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