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

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =15a(6) =59a(7) =185a(8) =513a(9) =1429a(10) =4429a(11) =15157a(12) =53063a(13) =181075a(14) =601335a(15) =1986857a(16) =6668441a(17) =22844345a(18) =79190777a(19) =274979521a(20) =952675283a(21) =3299619927a(22) =11466715411a(23) =40054475169a(24) =140536413497a(25) =494404614557