Expansion of 2*x^4 / (1 - 11*x + 45*x^2 - 80*x^3 + 49*x^4).

Terms

a(0) =0a(1) =0a(2) =0a(3) =2a(4) =22a(5) =152a(6) =842a(7) =4084a(8) =18116a(9) =75408a(10) =299730a(11) =1152834a(12) =4338280a(13) =16126958a(14) =59713888a(15) =221713192a(16) =829301072a(17) =3132108250a(18) =11945717358a(19) =45938159040a(20) =177695375802a(21) =689616061412