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

A024231

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

Terms

    a(0) =0a(1) =1a(2) =-2a(3) =-21a(4) =-228a(5) =5077a(6) =631834a(7) =37060863a(8) =791278008a(9) =-198249695063

External references