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A156465
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Number of n X n arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 16.
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0
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1, 0, 0, 3, 7, 36, 201, 9522, 78762, 5281910, 225908440, 34459271550, 1556654915420
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OFFSET
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1,4
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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