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A146441
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Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1100-0100-0111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 3, 9, 19, 39, 119, 357, 921, 3063, 15421, 82217, 416323, 2370803, 16101191, 113312875, 843888839, 7373458463, 76576709025
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