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A146429
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Number of n X n binary arrays with all ones connected only in a 101-111-101 pattern in any orientation.
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0
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1, 1, 3, 9, 19, 53, 531, 5709, 48307, 490649, 11283333, 359196547, 11541091447, 440660012263, 27722494439108, 2548067434592087, 280390489794224900
(list; graph; refs; listen; history; internal format)
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