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A265586
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Number of nX3 0..n*3-1 arrays with upper left zero and lower right n*3-1 and each element differing from its horizontal and antidiagonal neighbors by a power of two.
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1
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1, 84, 9327, 1427680, 308395359, 99770416100, 38840832559548, 10692035281792418, 4325881418160722213, 1373485273994265714224, 622008060358478772620983, 286739797768833085519267516
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