In how many ways can we place anywhere from \(0\) to \(9\) indistinguishable checkers on a \(3 \times 3\) checkerboard (no more than one checker per square), such that no row or column contains exactly \(1\) checker?
You missed some latex!
Sorry its \(0\) to \(9\)!
Please edit your question so that it reads properly.
+41 
