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%I #9 Jul 08 2022 11:48:24
%S 1,-1,3,-7,17,-39,93,-219,517,-1219,2877,-6787,16013,-37779,89133,
%T -210291,496141,-1170547,2761677,-6515635,15372365,-36268083,85567437,
%U -201879603,476295373,-1123725619,2651210445,-6255011635,14757474509,-34817369907,82144763085,-193804475187
%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,-2,2).
%F a(n) = -a(n-1) + 2 a(n-2) - 2 a(n-3) + 2 a(n-4) - _N-E. Fahssi_, Mar 29 2008
%F a(n) -a(n-1) = (-1)^(n+1)*A052912(n). - _R. J. Mathar_, Jul 08 2022
%K sign,easy
%O 0,3
%A _N. J. A. Sloane_, Nov 17 2002