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A221778
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Number of nX3 arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, without move-in move-out left turns
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1
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8, 258, 7676, 230621, 6911480, 207263892, 6215606652, 186396173357, 5589718833790, 167626605489419, 5026850431347057, 150747105072411113, 4520661588144287366, 135567321024902298286, 4065444442439149946284
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