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A147149
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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1000-1100-0111-0010 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 9, 9, 33, 33, 121, 121, 1109, 1109, 21917, 21917, 638145, 638145, 19928333, 19928333
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