-84562880

Appears in sequences

• sin(sin(arctanh(x)))=x-4/5!*x^5-136/7!*x^7-7408/9!*x^9-644416/11!*x^11...at n=6A012052
• exp(sinh(arctan(x)))=1+x+1/2!*x^2-3/4!*x^4-4/5!*x^5+21/6!*x^6...at n=13A012247