
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
In the arithmetic sequence {a_n}, the first term a_1 = 0 and the common difference d ≠ 0. If a_m = a_1 + a_2 + a_3 + … + a_20, find the value of m.

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