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

Terms

a(0) =1a(1) =-1a(2) =-1a(3) =-2a(4) =0a(5) =-1a(6) =2a(7) =-1a(8) =3a(9) =-3a(10) =4a(11) =-6a(12) =7a(13) =-10a(14) =13a(15) =-17a(16) =23a(17) =-30a(18) =40a(19) =-53a(20) =70a(21) =-93a(22) =123a(23) =-163a(24) =216a(25) =-286a(26) =379a(27) =-502a(28) =665a(29) =-881