Expansion of (1/x) * Series_Reversion( x * ((1-x)^3 + x) ).

Terms

a(0) =1a(1) =2a(2) =5a(3) =11a(4) =11a(5) =-77a(6) =-704a(7) =-3795a(8) =-15686a(9) =-48598a(10) =-74009a(11) =376623a(12) =4438840a(13) =27458060a(14) =126898948a(15) =440550682a(16) =849522927a(17) =-2621906045a(18) =-39993434701a(19) =-270428078305