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A207217
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Number of nX4 0..2 arrays avoiding the pattern z z+1 z in any row or column
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1
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69, 4761, 247163, 12584703, 647820815, 33403462497, 1721695415743, 88730578258613, 4572950799187243, 235680064764200747, 12146435820476346225, 626000438753879535467, 32262680221309448337639, 1662747377281516450070519
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