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A268071
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Number of nX4 0..3 arrays with every repeated value in every row and column unequal to the previous repeated value, and new values introduced in row-major sequential order.
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1
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12, 2191, 381958, 70985206, 12341773443, 2135811945390, 360625109847257, 60269655478497862, 9949083335191755757, 1629156960066795552208, 264820932563055654137153, 42807217788424085785910968
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