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A146401
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Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1000-1111-0010 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 3, 9, 19, 33, 77, 239, 919, 3879, 17353, 75579, 398897, 2332505, 16656293, 126029691, 1117371931, 10274166583
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