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A156420
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Number of 15 X 15 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, 0, 0, 30693320, 1890254100, 0, 0, 686163316440, 4354347220860, 0, 0, 141370447642494, 817218706478195, 0, 0
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OFFSET
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0,4
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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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