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A077919 Expansion of (1-x)^(-1)/(1+2*x-2*x^2+2*x^3). 1

%I

%S 1,-1,5,-13,39,-113,331,-965,2819,-8229,24027,-70149,204811,-597973,

%T 1745867,-5097301,14882283,-43450901,126860971,-370388309,1081400363,

%U -3157299285,9218175915,-26913751125,78578452651,-229420759381,669825926315,-1955650276693,5709793924779

%N Expansion of (1-x)^(-1)/(1+2*x-2*x^2+2*x^3).

%H <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (-1, 4, -4, 2).

%F a(0)=1, a(1)=-1, a(2)=5, a(3)=-13, a(n)=a(n-1)+4*a(n-2)-4*a(n-3)+2*a(n-4). - _Harvey P. Dale_, Aug 22 2013

%t CoefficientList[Series[(1-x)^(-1)/(1+2x-2x^2+2x^3),{x,0,40}],x] (* or *) LinearRecurrence[{-1,4,-4,2},{1,-1,5,-13},40] (* _Harvey P. Dale_, Aug 22 2013 *)

%K sign

%O 0,3

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

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Last modified October 4 04:26 EDT 2022. Contains 357237 sequences. (Running on oeis4.)