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

Terms

a(0) =1a(1) =-2a(2) =-4a(3) =1a(4) =7a(5) =1a(6) =-12a(7) =-7a(8) =18a(9) =20a(10) =-23a(11) =-45a(12) =21a(13) =88a(14) =1a(15) =-154a(16) =-68a(17) =241a(18) =223a(19) =-327a(20) =-532a(21) =345a(22) =1082a(23) =-140a(24) =-1959a(25) =-597a(26) =3181a(27) =2416a(28) =-4543a(29) =-6194