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

Terms

a(0) =1a(1) =-2a(2) =1a(3) =-4a(4) =0a(5) =-9a(6) =-5a(7) =-23a(8) =-24a(9) =-65a(10) =-90a(11) =-196a(12) =-311a(13) =-613a(14) =-1039a(15) =-1954a(16) =-3419a(17) =-6288a(18) =-11172a(19) =-20329a(20) =-36385a(21) =-65871a(22) =-118312a(23) =-213669a(24) =-384422a(25) =-693448a(26) =-1248623a(27) =-2251097a(28) =-4054895a(29) =-7308466