arctanh(arctan(x)*arctan(x))=2/2!*x^2-16/4!*x^4+608/6!*x^6-43776/8!*x^8...
A012464
arctanh(arctan(x)*arctan(x))=2/2!*x^2-16/4!*x^4+608/6!*x^6-43776/8!*x^8...
Terms
- a(0) =0a(1) =2a(2) =-16a(3) =608a(4) =-43776a(5) =5490432a(6) =-1043742720a(7) =281302333440
External references
- oeis: A012464