# Pascal's squared digit sum

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The Pascal's triangle is a triangle filled with numbers. The zeroth row is $$1$$,

the first is $$1 1$$,

the second is $$1 2 1$$,

the third is $$1 3 3 1$$,

the fourth is $$1 4 6 4 1$$, and so on. Let $$n$$ be the digit sum of the 16th number in the twenty-eighth row. Find $$n^2$$

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