Series reversion of y + y^2 + y^3.

Terms

a(0) =0a(1) =1a(2) =-1a(3) =1a(4) =0a(5) =-4a(6) =14a(7) =-30a(8) =33a(9) =55a(10) =-429a(11) =1365a(12) =-2652a(13) =1428a(14) =12920a(15) =-64600a(16) =178296a(17) =-277932a(18) =-152950a(19) =2770350a(20) =-10785390a(21) =25312650a(22) =-26053020a(23) =-84847620a(24) =576753450a(25) =-1856900682a(26) =3566658438a(27) =-843350102a(28) =-24973594296a(29) =117328602840