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A146574
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Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 0100-0100-1111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 3, 5, 11, 21, 43, 131, 425, 1453, 5677, 20565, 100203, 517949, 3251987, 21002085, 153166855, 1157817079, 10741996431, 104706915655
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