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A077894 Expansion of (1-x)^(-1)/(1+2*x^2+x^3). 0

%I #8 Jul 13 2015 21:34:11

%S 1,1,-1,-2,2,6,-1,-13,-3,28,20,-52,-67,85,187,-102,-458,18,1019,423,

%T -2055,-1864,3688,5784,-5511,-15255,5239,36022,4778,-77282,-45577,

%U 149787,168437,-253996,-486660,339556,1227317,-192451,-2794189,-842414,5780830,4479018,-10719245,-14738865

%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,-2,1,1).

%F a(0)=1, a(1)=1, a(2)=-1, a(3)=-2, a(n)=a(n-1)-2*a(n-2)+a(n-3)+a(n-4). - _Harvey P. Dale_, Feb 06 2015

%t CoefficientList[Series[(1-x)^(-1)/(1+2x^2+x^3),{x,0,50}],x] (* or *) LinearRecurrence[{1,-2,1,1},{1,1,-1,-2},50] (* _Harvey P. Dale_, Feb 06 2015 *)

%K sign

%O 0,4

%A _N. J. A. Sloane_, Nov 17 2002

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Last modified April 14 13:47 EDT 2024. Contains 371661 sequences. (Running on oeis4.)