arctan(arctan(sin(x)))=x-5/3!*x^3+129/5!*x^5-8133/7!*x^7+941601/9!*x^9...
A012187
arctan(arctan(sin(x)))=x-5/3!*x^3+129/5!*x^5-8133/7!*x^7+941601/9!*x^9...
Terms
- a(0) =1a(1) =-5a(2) =129a(3) =-8133a(4) =941601a(5) =-173748453a(6) =46802237793
External references
- oeis: A012187