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A147405
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Number of n X n binary arrays with all ones connected only in a 1001-1001-1111 pattern in any orientation.
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0
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1, 1, 1, 9, 25, 61, 265, 2725, 40501, 485293, 5980517, 124941205, 4561553811, 214166188181, 10710509884487, 650335804942117
(list; graph; refs; listen; history; internal format)
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