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A156413
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Number of 13 X 13 arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to n.
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0
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1, 1384, 481320, 23622288, 667960824, 4186295040, 26532092944, 72256187200, 617153224314, 1117730631388, 5750051401712, 11298978667872, 59576593947316, 150978985010061, 286675559366712, 512365063156800
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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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