Reversion of x - x^2 - 2*x^5.

Terms

a(0) =1a(1) =1a(2) =2a(3) =5a(4) =16a(5) =56a(6) =204a(7) =759a(8) =2880a(9) =11132a(10) =43732a(11) =174122a(12) =700952a(13) =2847840a(14) =11661592a(15) =48080811a(16) =199433880a(17) =831649380a(18) =3484523460a(19) =14662036550a(20) =61931353880a(21) =262503848400