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A146905
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Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 0010-1110-0111-0100 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 5, 9, 13, 21, 41, 107, 243, 717, 1683, 4947, 13775, 49539, 165935, 690319, 2538097, 11779735, 49469745, 268313075, 1318481817, 8182984957
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