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

Terms

a(0) =1a(1) =0a(2) =2a(3) =1a(4) =5a(5) =5a(6) =14a(7) =19a(8) =42a(9) =66a(10) =131a(11) =221a(12) =417a(13) =728a(14) =1341a(15) =2380a(16) =4334a(17) =7753a(18) =14041a(19) =25213a(20) =45542a(21) =81927a(22) =147798a(23) =266110a(24) =479779a(25) =864201a(26) =1557649a(27) =2806272a(28) =5057369a(29) =9112264