E.g.f. satisfies A(x) = 1/(1 - A(x) * (exp(x) - 1))^3.

A377453

E.g.f. satisfies A(x) = 1/(1 - A(x) * (exp(x) - 1))^3.

Terms

    a(0) =1a(1) =3a(2) =33a(3) =639a(4) =18177a(5) =687663a(6) =32585793a(7) =1858893039a(8) =124128928257

External references