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

Terms

a(0) =1a(1) =3a(2) =8a(3) =17a(4) =35a(5) =71a(6) =143a(7) =287a(8) =575a(9) =1151a(10) =2303a(11) =4607a(12) =9215a(13) =18431a(14) =36863a(15) =73727a(16) =147455a(17) =294911a(18) =589823a(19) =1179647a(20) =2359295a(21) =4718591a(22) =9437183a(23) =18874367a(24) =37748735a(25) =75497471a(26) =150994943a(27) =301989887a(28) =603979775a(29) =1207959551