Expansion of (1/x) * Series_Reversion( x * (1-x+x^2)^2 ).

Terms

a(0) =1a(1) =2a(2) =5a(3) =12a(4) =22a(5) =0a(6) =-284a(7) =-1938a(8) =-9367a(9) =-36938a(10) =-118105a(11) =-260130a(12) =56637a(13) =4890560a(14) =35945616a(15) =186674620a(16) =782890326a(17) =2632462236a(18) =5987222046a(19) =-2241224328a(20) =-129137211280a(21) =-967479390360