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A203273
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Number of nX4 0..5 arrays with every nonzero element less than or equal to some NW, E or S neighbor
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1
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1, 12783, 7849844, 2590250609, 805342647391, 273475278673606, 94164551870236956, 31840186365984384473, 10732714375394439304495, 3631600847251315774005507, 1229751760436754809100391393
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