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Let \(b_{k,n}\) be the \(k^\text{th}\) element of the \(n^\text{th}\) row of Pascal's triangle, with row \(1\) being \(\{1\}\), row \(2\) being \(\{1,1\}\), etc. Also the \(1^\text{st}\) element of each row is \(1.\) Find the value of

\[(b_{3,2015})^2 - \sum_{i=1}^{2013} i^3.\]

**Details and Assumptions:**

- For example, \(b_{1,1} = 1, b_{2,3} = 2\) and \(b_{5,6} = 5.\)

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