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%I #11 Apr 01 2023 18:08:56
%S 1,5,-15,29,-23,-43,225,-499,601,197,-2991,8189,-12599,5045,35265,
%T -125971,236857,-206683,-327375,1808861,-4117079,5115797,1120929,
%U -23825971,66994201,-105678715,49059345,275536829,-1022847863,1966396277,-1807797375,-2442192979,14557768441
%N Row sums of A129392.
%C Also a diagonal close to the top of A129392.
%H <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (-2, -1, 4).
%F Conjectures from _Colin Barker_, Oct 07 2015: (Start)
%F a(n) = -2*a(n-1) - a(n-2) + 4*a(n-3) for n>2.
%F G.f.: (4*x^2-7*x-1) / ((x-1)*(4*x^2+3*x+1)).
%F (End)
%t CoefficientList[Series[(4x^2-7x-1)/((x-1)(4x^2+3x+1)),{x,0,40}],x] (* or *) LinearRecurrence[{-2,-1,4},{1,5,-15},40] (* _Harvey P. Dale_, Apr 01 2023 *)
%Y Cf. A129392.
%K sign
%O 0,2
%A _Jonas Wallgren_, Apr 13 2007
%E More terms from _R. J. Mathar_, Apr 30 2007
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