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A156441
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Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 6.
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0
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2, 22, 32, 635, 1414, 32990, 130456, 4220548, 36058540, 1814137996, 26532092944, 1840450801838, 35263399597916, 3086652618464548, 71091010320744928, 7527949573364777296
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OFFSET
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3,1
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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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