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A146811
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Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1000-1010-1111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 3, 7, 15, 31, 65, 179, 483, 1549, 5893, 23203, 108809, 513209, 2742185, 15938025, 102500855
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