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

Terms

a(0) =0a(1) =1a(2) =3a(3) =5a(4) =8a(5) =11a(6) =15a(7) =19a(8) =24a(9) =29a(10) =35a(11) =41a(12) =48a(13) =55a(14) =63a(15) =71a(16) =80a(17) =89a(18) =99a(19) =109a(20) =120a(21) =131a(22) =143a(23) =155a(24) =168a(25) =181a(26) =195a(27) =209a(28) =224a(29) =239