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A251350
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Number of (n+1)X(7+1) 0..2 arrays with every 2X2 subblock summing to 3 4 or 5
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1
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2751003, 1484345363, 851555497489, 499036482452523, 294431140648806145, 174138621993095863507, 103080390183621380574945, 61037103329051885036755407, 36146149604336570512614106833
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