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

A009516

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

Terms

    a(0) =1a(1) =4a(2) =12a(3) =-1472a(4) =-159792a(5) =-16362304a(6) =-1834702400a(7) =-218477736448

External references