E.g.f.: sinh(x)/(1-sinh(x)-sinh(x)^2).

A189087

E.g.f.: sinh(x)/(1-sinh(x)-sinh(x)^2).

Terms

    a(0) =1a(1) =2a(2) =13a(3) =80a(4) =721a(5) =7232a(6) =87613a(7) =1193600a(8) =18431041a(9) =315130112a(10) =5936395213a(11) =121904337920

External references