Revert transform of 2*x*(1-x)*(1+x^2-x^5) -x/(1+x).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =15a(6) =57a(7) =167a(8) =423a(9) =1099a(10) =3391a(11) =11855a(12) =41149a(13) =134185a(14) =418859a(15) =1313861a(16) =4285349a(17) =14456605a(18) =49097477a(19) =164889821a(20) =548126215a(21) =1824046555a(22) =6131204373a(23) =20817947419a(24) =70988707243a(25) =241907381783a(26) =823235370195