Expansion of ((1-x)/(1-2x))^9.

Terms

a(0) =1a(1) =9a(2) =54a(3) =264a(4) =1134a(5) =4446a(6) =16272a(7) =56412a(8) =187137a(9) =598417a(10) =1854882a(11) =5597172a(12) =16498632a(13) =47638512a(14) =135048672a(15) =376592064a(16) =1034663040a(17) =2804590080a(18) =7509232640a(19) =19880294400a(20) =52088352768a(21) =135173578752a(22) =347680161792a(23) =886900948992