sin(tan(x)*sin(x))=2/2!*x^2+4/4!*x^4-58/6!*x^6-1976/8!*x^8...

A009513

sin(tan(x)*sin(x))=2/2!*x^2+4/4!*x^4-58/6!*x^6-1976/8!*x^8...

Terms

    a(0) =0a(1) =2a(2) =4a(3) =-58a(4) =-1976a(5) =-125878a(6) =-9435956a(7) =-836433778a(8) =-89733620336

External references