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A147015
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Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 01000-11111-00010 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 3, 5, 11, 17, 29, 49, 193, 509, 1945, 5173, 19089, 57135, 304805, 1236463, 7710953, 34938029, 239632727, 1249524805, 10579289505, 68493745825
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