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

Terms

a(0) =1a(1) =1a(2) =3a(3) =9a(4) =33a(5) =127a(6) =519a(7) =2189a(8) =9489a(9) =41953a(10) =188531a(11) =858441a(12) =3952133a(13) =18365543a(14) =86031567a(15) =405819137a(16) =1925991665a(17) =9189984561a(18) =44061194915a(19) =212159132049