Series reversion of x + 2*x^2 + x^4.

Terms

a(0) =1a(1) =-2a(2) =8a(3) =-41a(4) =236a(5) =-1456a(6) =9412a(7) =-62922a(8) =431464a(9) =-3017894a(10) =21448024a(11) =-154438752a(12) =1124289292a(13) =-8260992104a(14) =61185802144a(15) =-456328537873