Expansion of (1/x) * Series_Reversion( x * ((1-x^3)^2 - x) ).

Terms

a(0) =1a(1) =1a(2) =2a(3) =7a(4) =26a(5) =98a(6) =387a(7) =1590a(8) =6699a(9) =28754a(10) =125359a(11) =553696a(12) =2472267a(13) =11140492a(14) =50599174a(15) =231401382a(16) =1064646228a(17) =4924458114a(18) =22886125061a(19) =106815213813a(20) =500447918795