What does $\frac{1}{1+\frac{2}{2+\frac{3}{{\vdots}}}}$ evaluate to?

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I was curious what does $$\cfrac{1}{1+\cfrac{2}{2+\cfrac{3}{3+\cfrac{4}{\vdots}}}}$$ evaluate to. Empirically, I observed that it equals approximately $0.5819767$, and a calculator found that this value agrees with $\frac{1}{e-1}$ to at least 8 places. Is $\frac{1}{e-1}$ the exact value of this continued fraction? If this is true, is this result new? And how could the equivalence be proved?