Expansion of g.f. -2*x/(1 - 5*x + 2*x^2).

Terms

a(0) =0a(1) =-2a(2) =-10a(3) =-46a(4) =-210a(5) =-958a(6) =-4370a(7) =-19934a(8) =-90930a(9) =-414782a(10) =-1892050a(11) =-8630686a(12) =-39369330a(13) =-179585278a(14) =-819187730a(15) =-3736768094a(16) =-17045465010a(17) =-77753788862a(18) =-354678014290