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A147189
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Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 11000-01110-00011 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 3, 5, 11, 19, 53, 119, 315, 741, 2791, 8507, 37441, 131241, 690373, 2947311, 17685311, 87080583, 622517947, 3695889011, 31549600531
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