Expansion of e.g.f. sin(x)*sin(tanh(x)) (even powers only).

A009549

Expansion of e.g.f. sin(x)*sin(tanh(x)) (even powers only).

Terms

    a(0) =0a(1) =2a(2) =-16a(3) =288a(4) =-9920a(5) =541184a(6) =-42274816a(7) =4449451776a(8) =-605255720960

External references