arctan(tanh(x)*tanh(x))=2/2!*x^2-16/4!*x^4+32/6!*x^6+18944/8!*x^8...
A012696
arctan(tanh(x)*tanh(x))=2/2!*x^2-16/4!*x^4+32/6!*x^6+18944/8!*x^8...
Terms
- a(0) =2a(1) =-16a(2) =32a(3) =18944a(4) =-1904128a(5) =41160704a(6) =41418432512
External references
- oeis: A012696