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A298649
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Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 6 or 7 king-move adjacent elements, with upper left element zero.
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0
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0, 4, 48, 466, 5124, 75562, 1277500, 30337435, 1060912744, 50167771709, 3415576723102, 354153850821427
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