Expansion of tan(x)*tan(tanh(x))/2.

A024252

Expansion of tan(x)*tan(tanh(x))/2.

Terms

    a(0) =0a(1) =1a(2) =4a(3) =24a(4) =1088a(5) =36352a(6) =1283584a(7) =160269312a(8) =11824283648

External references