G.f. satisfies: A(x) = 1 + x*A(x*A(x)^3)^2.

Terms

a(0) =1a(1) =1a(2) =2a(3) =11a(4) =74a(5) =635a(6) =6296a(7) =70268a(8) =864106a(9) =11546531a(10) =165996792a(11) =2548556963a(12) =41546769324a(13) =715850868468