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

Terms

a(0) =1a(1) =-3a(2) =8a(3) =-23a(4) =65a(5) =-184a(6) =521a(7) =-1475a(8) =4176a(9) =-11823a(10) =33473a(11) =-94768a(12) =268305a(13) =-759619a(14) =2150616a(15) =-6088775a(16) =17238401a(17) =-48804968a(18) =138175513a(19) =-391199363a(20) =1107554720a(21) =-3135683679a(22) =8877676161a(23) =-25134274400a(24) =71159584801a(25) =-201465394563a(26) =570384233128