Expansion of (1 - x - 4*x^2)/(1 - 2*x - 7*x^2 + 8*x^3).

Terms

a(0) =1a(1) =1a(2) =5a(3) =9a(4) =45a(5) =113a(6) =469a(7) =1369a(8) =5117a(9) =16065a(10) =56997a(11) =185513a(12) =641485a(13) =2125585a(14) =7257461a(15) =24262137a(16) =82321821a(17) =276418913a(18) =934993477a(19) =3146344777a(20) =10626292589a(21) =35797050801a(22) =120807391509a(23) =407183797913