arcsin(tanh(x)*arctan(x))=2/2!*x^2-16/4!*x^4+440/6!*x^6-25856/8!*x^8...
A012678
arcsin(tanh(x)*arctan(x))=2/2!*x^2-16/4!*x^4+440/6!*x^6-25856/8!*x^8...
Terms
- a(0) =2a(1) =-16a(2) =440a(3) =-25856a(4) =2702368a(5) =-442400000a(6) =104680527744
External references
- oeis: A012678