Expansion of (1-x^2)/(1-2*x^2+4*x^3+x^4).

Terms

a(0) =1a(1) =0a(2) =1a(3) =-4a(4) =1a(5) =-12a(6) =17a(7) =-24a(8) =81a(9) =-104a(10) =241a(11) =-508a(12) =817a(13) =-1876a(14) =3425a(15) =-6512a(16) =13537a(17) =-24848a(18) =49697a(19) =-97332a(20) =185249a(21) =-368604a(22) =710129a(23) =-1380872a(24) =2709425a(25) =-5233656a(26) =10232209a(27) =-19924140a(28) =38689617a(29) =-75543460