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

Terms

a(0) =1a(1) =1a(2) =4a(3) =8a(4) =22a(5) =52a(6) =132a(7) =324a(8) =808a(9) =2000a(10) =4968a(11) =12320a(12) =30576a(13) =75856a(14) =188224a(15) =467008a(16) =1158752a(17) =2875072a(18) =7133632a(19) =17699904a(20) =43916928a(21) =108966400a(22) =270366848a(23) =670832640a(24) =1664466176a(25) =4129863936a(26) =10246994944a(27) =25424785408a(28) =63083832832