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

Terms

a(0) =1a(1) =2a(2) =6a(3) =19a(4) =60a(5) =189a(6) =595a(7) =1873a(8) =5896a(9) =18560a(10) =58425a(11) =183916a(12) =578949a(13) =1822473a(14) =5736961a(15) =18059374a(16) =56849086a(17) =178955183a(18) =563332848a(19) =1773314929a(20) =5582216355a(21) =17572253481a(22) =55315679788a(23) =174128175064a(24) =548137914373