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A147027
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Number of n X n binary arrays with all ones connected only in a 0100-0100-1111-0010 pattern in any orientation.
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0
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1, 1, 1, 9, 33, 81, 593, 11281, 273235, 6759617, 249956567, 17607387437, 1915544919591, 282005360821455
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