tanh(tan(x)*arcsin(x))=2/2!*x^2+12/4!*x^4-50/6!*x^6-14280/8!*x^8...

A012382

tanh(tan(x)*arcsin(x))=2/2!*x^2+12/4!*x^4-50/6!*x^6-14280/8!*x^8...

Terms

    a(0) =2a(1) =12a(2) =-50a(3) =-14280a(4) =-1068422a(5) =-30200060a(6) =10958392198

External references