Expansion of e.g.f. exp(2*x)*(exp(x) - x).

Terms

a(0) =1a(1) =2a(2) =5a(3) =15a(4) =49a(5) =163a(6) =537a(7) =1739a(8) =5537a(9) =17379a(10) =53929a(11) =165883a(12) =506865a(13) =1541075a(14) =4668281a(15) =14103147a(16) =42522433a(17) =128026051a(18) =385061193a(19) =1157280731a(20) =3476298641a(21) =10438333107a(22) =31334922265a(23) =94046709835a(24) =282228209889a(25) =846869179043