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

Terms

a(0) =1a(1) =2a(2) =5a(3) =15a(4) =51a(5) =187a(6) =719a(7) =2858a(8) =11650a(9) =48438a(10) =204630a(11) =875867a(12) =3790172a(13) =16554305a(14) =72883035a(15) =323109570a(16) =1441152303a(17) =6462494515a(18) =29118219850a(19) =131761291852a(20) =598529262016