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

Terms

a(0) =1a(1) =1a(2) =1a(3) =4a(4) =16a(5) =46a(6) =139a(7) =511a(8) =1891a(9) =6707a(10) =24366a(11) =91840a(12) =348236a(13) =1320309a(14) =5056414a(15) =19565036a(16) =76077330a(17) =296994727a(18) =1165438921a(19) =4594915664a(20) =18181401268a(21) =72176250259a(22) =287450966807