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A221063
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Equals one maps: number of 2Xn binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and antidiagonal neighbors in a random 0..3 2Xn array
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2
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1, 8, 37, 172, 771, 3392, 14569, 61210, 252491, 1028162, 4152903, 16695976, 66953537, 268144582, 1073206163, 4293994258, 17178121515, 68716367280, 274872418553, 1099502006098, 4398029741851, 17592156966114, 70368693978927
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