E.g.f. satisfies A(x) = 1/(1 - A(x) * (exp(x) - 1))^4.

A377454

E.g.f. satisfies A(x) = 1/(1 - A(x) * (exp(x) - 1))^4.

Terms

    a(0) =1a(1) =4a(2) =56a(3) =1384a(4) =50216a(5) =2422024a(6) =146279816a(7) =10633540264a(8) =904699882856

External references