E.g.f. satisfies A(x) = x*(1+A(A(x))), A(0)=0.

A035049

E.g.f. satisfies A(x) = x*(1+A(A(x))), A(0)=0.

Terms

    a(0) =1a(1) =2a(2) =12a(3) =144a(4) =2760a(5) =74880a(6) =2676240a(7) =120234240a(8) =6571393920a(9) =426547296000

External references