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

Terms

a(0) =1a(1) =-3a(2) =4a(3) =-1a(4) =-9a(5) =24a(6) =-31a(7) =5a(8) =76a(9) =-193a(10) =239a(11) =-16a(12) =-639a(13) =1549a(14) =-1836a(15) =-65a(16) =5351a(17) =-12408a(18) =14049a(19) =2069a(20) =-44644a(21) =99199a(22) =-107041a(23) =-28960a(24) =371201a(25) =-791523a(26) =811684a(27) =330879a(28) =-3076649a(29) =6303224