Expansion of x*(1+4*x)/(1-x-25*x^2).

Terms

a(0) =1a(1) =5a(2) =30a(3) =155a(4) =905a(5) =4780a(6) =27405a(7) =146905a(8) =832030a(9) =4504655a(10) =25305405a(11) =137921780a(12) =770556905a(13) =4218601405a(14) =23482524030a(15) =128947559155a(16) =716010659905