Expansion of (1-5*x+6*x^2-x^3)/(1-9*x+28*x^2-35*x^3+15*x^4-x^5).

Terms

a(0) =1a(1) =4a(2) =14a(3) =48a(4) =165a(5) =572a(6) =2002a(7) =7071a(8) =25176a(9) =90251a(10) =325358a(11) =1178291a(12) =4282811a(13) =15612092a(14) =57040186a(15) =208772476a(16) =765186422a(17) =2807556411a(18) =10309833845a(19) =37883902913a(20) =139275229088a(21) =512223805060