👉 In mathematics, a tableau is an arrangement of n elements in a grid. It's a special kind of array where each element can be placed exactly once in any row or column, but not both. For example, the following are all valid arrangements of 3 elements in a 2x3 grid: ``` 1 2 3 4 5 ``` A tableau is also known as an arrangement table or a permutation table. For instance, the number of ways to
