Expansion of (1-4*x-x^2)/((1-x)*(1-4*x-5*x^2)).

Terms

a(0) =1a(1) =1a(2) =5a(3) =21a(4) =105a(5) =521a(6) =2605a(7) =13021a(8) =65105a(9) =325521a(10) =1627605a(11) =8138021a(12) =40690105a(13) =203450521a(14) =1017252605a(15) =5086263021a(16) =25431315105a(17) =127156575521a(18) =635782877605