E.g.f.: exp( Sum_{n>=1} G_n(x)^n/n ) where G_n(x) = x + x*G_n(x)^n.

A194559

E.g.f.: exp( Sum_{n>=1} G_n(x)^n/n ) where G_n(x) = x + x*G_n(x)^n.

Terms

    a(0) =1a(1) =1a(2) =4a(3) =18a(4) =132a(5) =900a(6) =10560a(7) =96600a(8) =1500240a(9) =19066320a(10) =369714240a(11) =5359163040a(12) =147177898560

External references