Expansion of sin(tan(x))/cosh(x).

A009510

Expansion of sin(tan(x))/cosh(x).

Terms

    a(0) =1a(1) =-2a(2) =12a(3) =-464a(4) =336a(5) =-838752a(6) =-11036608a(7) =-5128035072a(8) =-109537337088

External references