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A302206
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Number of n X n 0..1 arrays with every element equal to 0, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
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0
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1, 2, 16, 7, 448, 1395, 55922, 3509969, 73189971, 33707749345, 2102356505182
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