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A147253
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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 11100-00100-00111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 11, 17, 41, 57, 231, 453, 1543, 3457, 18427, 50015, 289401, 862907, 5771143, 20904685, 158696163, 662519097
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