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A147472
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Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 1100-1111-0100-0100 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 5, 5, 9, 9, 19, 19, 55, 55, 245, 245, 1021, 1021, 4107, 4107, 20679, 20679
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