References to A100635

Number of 2 X 2 matrices with elements in {1,2,...,n} such that LCMs of rows and columns are n.
1, 7, 7, 17, 7, 49, 7, 31, 17, 49, 7, 119, 7, 49, 49, 49, 7, 119, 7, 119, 49, 49, 7, 217, 17

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