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A147262
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0100-1100-0111-0001 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 199, 377, 3217, 8011, 104473, 273171, 9678777, 30911627, 4517322323, 18623780151, 3664520343941, 18523730792349, 4450318556374425, 27331408113246915
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