G.f. satisfies: A(x) = A(x/A(x))^2 - x.

Terms

a(0) =1a(1) =1a(2) =1a(3) =4a(4) =24a(5) =194a(6) =1910a(7) =21906a(8) =284714a(9) =4118920a(10) =65499703a(11) =1134357186a(12) =21241909288a(13) =427614219498