636337

Appears in sequences

• Expansion of e.g.f.: exp(tan(arctanh(x)))=1+x+1/2!*x^2+5/3!*x^3+17/4!*x^4+121/5!*x^5...at n=9A012174
• sinh(tan(arctanh(x)))=x+5/3!*x^3+121/5!*x^5+6621/7!*x^7+636337/9!*x^9...at n=4A012179