Revert transform of 2*x*(1 - x - x^3 - x^5)-x/(1+x).

Terms

a(0) =1a(1) =1a(2) =3a(3) =11a(4) =45a(5) =197a(6) =903a(7) =4277a(8) =20773a(9) =102893a(10) =517771a(11) =2639571a(12) =13603509a(13) =70758321a(14) =370979823a(15) =1958471433a(16) =10401832121a(17) =55542275273a(18) =297991827555