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A147401
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Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1000-1110-0111-0001 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 9, 17, 35, 101, 227, 539, 1279, 5573, 17447, 78819, 285189, 1548177, 6812379, 38874621, 188648393, 1338014585
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