Expansion of (1+x-x^2) / (1-x-4*x^2+2*x^3+2*x^4).

Terms

a(0) =1a(1) =2a(2) =5a(3) =11a(4) =25a(5) =55a(6) =123a(7) =271a(8) =603a(9) =1331a(10) =2955a(11) =6531a(12) =14483a(13) =32035a(14) =70995a(15) =157107a(16) =348051a(17) =770419a(18) =1706419a(19) =3777779a(20) =8366515a(21) =18523955a(22) =41021619a(23) =90828851a(24) =201134387a(25) =445358643a(26) =986195251a(27) =2183703347a(28) =4835498291a(29) =10707203891