
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
Define "Equally Summed Sequence": In a sequence, if the sum of each term and its subsequent term is always a constant, then this sequence is called an Equally Summed Sequence. Given that $a\_1=2$ and the common sum is $5$, find the value of $a\_{18}$.

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