Expansion of series reversion of x*(1 - x^3*Sum_{k>=1} x^k).

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =1a(5) =1a(6) =1a(7) =1a(8) =6a(9) =12a(10) =19a(11) =27a(12) =71a(13) =166a(14) =329a(15) =579a(16) =1222a(17) =2756a(18) =5921a(19) =11754a(20) =24179a(21) =52372a(22) =114031a(23) =239726a(24) =502269a(25) =1074961a(26) =2333143a(27) =5017552a(28) =10714567a(29) =23006558