316369129

Appears in sequences

• arctan(sec(x)*arctanh(x))=x+3/3!*x^3-7/5!*x^5-917/7!*x^7-7183/9!*x^9...at n=6A012844
• E.g.f.: log(cosh(x)+arctan(x))=x-3/3!*x^3+12/4!*x^4-7/5!*x^5-168/6!*x^6...at n=13A013188