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A147055
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Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 0100-1101-0111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 3, 9, 19, 33, 55, 157, 613, 2645, 10617, 38367, 155201, 818161, 5194409, 36087637, 257389985
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