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A146175
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Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 110-100-111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 5, 13, 25, 45, 121, 385, 1395, 5901, 28053, 137719, 714777, 4090907, 28017605, 214429525, 1879119265, 18054271787, 200571323617
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