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

Terms

a(0) =1a(1) =1a(2) =2a(3) =6a(4) =18a(5) =57a(6) =191a(7) =660a(8) =2334a(9) =8417a(10) =30831a(11) =114380a(12) =428915a(13) =1623143a(14) =6190876a(15) =23774613a(16) =91849846a(17) =356735941a(18) =1392091107a(19) =5455425618a(20) =21460947111a(21) =84717452192a(22) =335479515201