Question 46
An $11 \times 11$ grid is labeled with consecutive rows $0,1,2, \ldots, 10$ and columns $0,1,2, \ldots, 10$ so that it is filled with integers from $1$ to $2^{10}$, inclusive, and the sum of all of the numbers in row $n$ and in column $n$ are both divisible by $2^{n}$. Find the number of possible distinct grids.