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Explanation of Changes:
Loop starting from i = 3:
This matches the idea that Tribonacci starts at n = 3 for the iterative part. It loops until i = n, making it more aligned with the index you are calculating.
Renaming nextT to nextTerm:
This improves code readability by being more descriptive.
Notes: <The overall structure of the program is unchanged, but the slight improvements make the code easier to understand and maintain.>