log(cos(tanh(x)))=-1/2!*x^2+6/4!*x^4-72/6!*x^6+1456/8!*x^8...
A012242
log(cos(tanh(x)))=-1/2!*x^2+6/4!*x^4-72/6!*x^6+1456/8!*x^8...
Terms
- a(0) =-1a(1) =6a(2) =-72a(3) =1456a(4) =-47104a(5) =2390784a(6) =-180612096a(7) =18625189888
External references
- oeis: A012242