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If I am trying to generalize the number of possible combinations of a nxn block with n objects.

So lets say we have n=5.

If we have a 5x5 block (25 spaces) with 5 objects (assume objects cannot share spaces), what is the total number of combinations possible?

My first guess was 5^3 = 125, but that doesn't seem likely. I then played with the idea of holding one object static and trying to count the number of combinations of all the other objects. That didn't work. So here I am.

Thanks ahead of time for the help.