Let \( F(n)=\sum_{r=0}^{n-1}\left(\frac{{ }^{n} C_{r}}{{ }^{n} C_{r}+{ }^{n} C_{r+1}}\right) \),....

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Let \( F(n)=\sum_{r=0}^{n-1}\left(\frac{{ }^{n} C_{r}}{{ }^{n} C_{r}+{ }^{n} C_{r+1}}\right) \), find the value of
\( \mathrm{P} \)
\( F(16) \).



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