
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Given the sequence ${{a_n}}$, let ${{S_n}}$ denote the sum of its first $n$ terms, where ${{a_1}=1}$, and for $n \geq 2$, the equation $\frac{2{{a_n}}}{{{a_n}}{{S_n}}-{{S}^{2}}}=1$ holds. Find the value of ${{S_{2017}}}$.

Present the answer in LaTex format: \boxed{Your answer}
user