Expansion of e.g.f.: tanh(x*W(x)), where W(x) = LambertW(-x)/(-x).

A274279

Expansion of e.g.f.: tanh(x*W(x)), where W(x) = LambertW(-x)/(-x).

Terms

    a(0) =1a(1) =2a(2) =7a(3) =40a(4) =341a(5) =3936a(6) =57107a(7) =992384a(8) =20025385a(9) =459466240a(10) =11804134079a(11) =335571265536

External references