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

Terms

a(0) =1a(1) =-3a(2) =8a(3) =-24a(4) =70a(5) =-204a(6) =596a(7) =-1740a(8) =5080a(9) =-14832a(10) =43304a(11) =-126432a(12) =369136a(13) =-1077744a(14) =3146624a(15) =-9187008a(16) =26822752a(17) =-78312768a(18) =228645056a(19) =-667561152a(20) =1949037952a(21) =-5690488320a(22) =16614174848a(23) =-48507402240a(24) =141624130816a(25) =-413491415808