Expansion of tanh(x)/cos(sin(x)).

A009840

Expansion of tanh(x)/cos(sin(x)).

Terms

    a(0) =1a(1) =1a(2) =1a(3) =-167a(4) =289a(5) =-30799a(6) =7624865a(7) =-327166135a(8) =29995758529

External references