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A187464
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Number of 4X4 0..n arrays with all the 2X2 subblocks nonsingular and the array of 2X2 subblock determinants symmetric
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0
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144, 89618, 5098224, 100936174, 1061948616, 7706500654, 41131010240, 180898687166, 670434819776, 2192125079476, 6398465414348, 17262285779402
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OFFSET
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1,1
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COMMENTS
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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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