
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
Arrange the natural numbers according to the following triangular pattern. What is the sum of the numbers in the 10th row?

```
               1
            2  3  4
         5   6  7  8   9
      10  11  12 13 14  15  16
17  18 19  20 21 22  23  24  25
...
```

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