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A278410
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Number of nX4 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly two mistakes.
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1
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15, 2550, 201539, 11454780, 514122657, 20086951472, 724313811311, 24378309172117, 757386980723842, 21490393664858691, 555075804780316188, 13082453926050947533, 282833107470851109743, 5643469565485557711688
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