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A304127
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Number of n X n 0..1 arrays with every element unequal to 0, 1, 3 or 6 king-move adjacent elements, with upper left element zero.
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0
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1, 5, 9, 44, 176, 651, 2945, 14708, 79188, 495071, 3628565, 29134749, 265855219, 2732640025, 30998016185, 398665350465
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