Reversion of y - y^2 - y^3 - y^5.

Terms

a(0) =0a(1) =1a(2) =1a(3) =3a(4) =10a(5) =39a(6) =161a(7) =698a(8) =3126a(9) =14360a(10) =67276a(11) =320229a(12) =1544257a(13) =7528577a(14) =37044530a(15) =183733552a(16) =917598103a(17) =4610484729a(18) =23289784660a(19) =118209987295a(20) =602556082765