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

Terms

a(0) =0a(1) =1a(2) =4a(3) =10a(4) =26a(5) =64a(6) =160a(7) =396a(8) =984a(9) =2440a(10) =6056a(11) =15024a(12) =37280a(13) =92496a(14) =229504a(15) =569440a(16) =1412896a(17) =3505664a(18) =8698240a(19) =21582016a(20) =53549184a(21) =132865920a(22) =329666176a(23) =817965824a(24) =2029532160a(25) =5035663616a(26) =12494459904a(27) =31001182720a(28) =76919958016a(29) =190853361664