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Search: id:A156442
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| A156442 |
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Number of nXn arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 6. |
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1
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| 2, 0, 7, 0, 870, 0, 68180, 0, 18391220, 0, 10399874310, 0, 10075020851140, 0, 14707103186511120, 0
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