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%I #5 Sep 21 2016 17:24:42
%S 1,1,4,13,37,112,337,1009,3028,9085,27253,81760,245281,735841,2207524,
%T 6622573,19867717,59603152,178809457,536428369,1609285108,4827855325,
%U 14483565973,43450697920,130352093761,391056281281,1173168843844,3519506531533,10558519594597
%N Expansion of (1-x)/(1-2*x-2*x^2-3*x^3).
%H <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (2,2,3).
%t CoefficientList[Series[(1-x)/(1-2x-2x^2-3x^3),{x,0,30}],x] (* or *) LinearRecurrence[{2,2,3},{1,1,4},30] (* _Harvey P. Dale_, Sep 21 2016 *)
%K nonn
%O 0,3
%A _N. J. A. Sloane_, Nov 17 2002