tan(arctanh(x)+arctan(x))=2*x+16/3!*x^3+560/5!*x^5+42880/7!*x^7...
A013177
tan(arctanh(x)+arctan(x))=2*x+16/3!*x^3+560/5!*x^5+42880/7!*x^7...
Terms
- a(0) =2a(1) =16a(2) =560a(3) =42880a(4) =5692160a(5) =1158860800a(6) =335091660800
External references
- oeis: A013177