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

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =9a(5) =37a(6) =125a(7) =394a(8) =1318a(9) =4819a(10) =18233a(11) =68498a(12) =255405a(13) =959469a(14) =3658197a(15) =14105139a(16) =54676054a(17) =212590108a(18) =829729478a(19) =3253606934a(20) =12815186231a(21) =50657719421a(22) =200837879181a(23) =798401660056