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A207978
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Number of n X 2 nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any diagonal or antidiagonal neighbor (colorings ignoring permutations of colors).
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1
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2, 7, 67, 1080, 25287, 794545, 31858034, 1573857867, 93345011951, 6514819011216, 526593974392123, 48658721593531669, 5084549201524804642, 595348294459678745663, 77500341343460209843627
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