Expansion of (1-8*x+21*x^2-20*x^3+5*x^4)/(1-9*x+28*x^2-35*x^3+15*x^4-x^5).

Terms

a(0) =1a(1) =1a(2) =2a(3) =5a(4) =14a(5) =42a(6) =132a(7) =429a(8) =1430a(9) =4862a(10) =16795a(11) =58766a(12) =207783a(13) =740924a(14) =2660139a(15) =9603089a(16) =34818270a(17) =126676726a(18) =462125928a(19) =1689438278a(20) =6186432967a(21) =22682699779a(22) =83249302471a(23) =305773834030