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

Terms

a(0) =1a(1) =1a(2) =3a(3) =8a(4) =26a(5) =87a(6) =308a(7) =1122a(8) =4196a(9) =15995a(10) =61953a(11) =243091a(12) =964307a(13) =3860820a(14) =15581231a(15) =63318119a(16) =258874412a(17) =1064093055a(18) =4394851631a(19) =18229191263a(20) =75904152261a(21) =317161817092