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A156415
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Number of 13 X 13 arrays of squares of integers, symmetric under 90-degree rotation, with all rows summing to n.
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0
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1, 120, 0, 0, 14564760, 66083040, 0, 0, 2511725250, 3360660500, 0, 0, 105602337600, 192407274081, 0, 0, 1556654915420, 1665635124840, 0, 0
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OFFSET
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0,2
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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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