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A147344
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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0100-0100-1111-0010-0010 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 3, 15, 29, 45, 73, 153, 491, 1439, 4619, 16351, 52019, 195927, 800019, 3525897, 17183583, 88313479
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