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A146590
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Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 0110-1111-0100 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 5, 13, 25, 41, 73, 405, 2087, 9095, 31781, 109905, 706437, 6193961, 52066515, 395176419, 2801856537, 27230658787
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