58001

Appears in sequences

• Expansion of e.g.f.: exp(arctan(tanh(x)))=1+x+1/2!*x^2-3/3!*x^3-15/4!*x^4+41/5!*x^5...at n=9A012222
• sinh(arctan(tanh(x)))=x-3/3!*x^3+41/5!*x^5-1243/7!*x^7+58001/9!*x^9...at n=4A012225
• Index of first occurrence of n in A000319, or -1 if n never appears there.at n=24A381230