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A156446
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Number of nXn arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 8.
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0
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1, 2, 10, 18, 308, 1716, 83987, 644220, 42440517, 448032730, 40142592042, 617153224314, 75157230205402, 1794934830265052, 303255697073306250
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