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Search: id:A156462
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| A156462 |
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Number of nXn arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 15. |
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| 22, 0, 3200, 2952, 1651208, 6328576, 2727888448, 31390349120, 15449498784320, 512365063156800
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