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Delannoy Numbers
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What is the Delannoy number D(n, m)?
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A
The number of paths from (0, 0) to (n, m) in the grid, where each step is either right or up.
💡 Explanation:
The Delannoy number D(n, m) is the number of paths from (0, 0) to (n, m) in the grid, where each step is either right or up. This is a classic problem in combinatorics and has many applications in counting problems.