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A207694
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Number of 3 X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 1 1 vertically.
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2
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6, 36, 60, 100, 240, 576, 1296, 2916, 6804, 15876, 36288, 82944, 191808, 443556, 1018980, 2340900, 5397840, 12446784, 28640304, 65901924, 151822836, 349764804, 805233312, 1853819136, 4269519072, 9833102244, 22641659460, 52134588900
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