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A156398
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Number of 9 X 9 arrays of squares of integers, symmetric about main diagonal, with all rows summing to n.
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0
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1, 2620, 708256, 24243520, 154294582, 253938600, 1164072896, 10953612400, 25250999564, 22620401127, 101930271184, 570443632816, 781505368112, 474109634808, 1937140499056, 9267607094192, 12532444401442, 7484174351906
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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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