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

Terms

a(0) =1a(1) =1a(2) =2a(3) =6a(4) =20a(5) =70a(6) =254a(7) =947a(8) =3604a(9) =13936a(10) =54574a(11) =215914a(12) =861454a(13) =3461208a(14) =13988932a(15) =56821743a(16) =231793334a(17) =949033702a(18) =3897956648a(19) =16053912116a(20) =66275614190a(21) =274168532480