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How many ways are there to put 9 differently colored beads on a 3 by 3 grid if the purple bead and the green bead cannot be adjacent (either horizontally, vertically, or diagonally), and rotations and reflections of the grid are considered the same?

 Oct 11, 2020
 #1
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20160 

not sure if this is right

 Oct 11, 2020

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