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

Terms

a(0) =1a(1) =-3a(2) =5a(3) =-6a(4) =4a(5) =3a(6) =-16a(7) =33a(8) =-47a(9) =45a(10) =-10a(11) =-72a(12) =199a(13) =-336a(14) =401a(15) =-267a(16) =-203a(17) =1074a(18) =-2212a(19) =3147a(20) =-3008a(21) =657a(22) =4841a(23) =-13347a(24) =22510a(25) =-26832a(26) =17807a(27) =13728a(28) =-72095a(29) =148269