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A146373
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Number of n X n binary arrays with all ones connected only in a 0100-1111-0100 pattern in any orientation.
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0
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1, 1, 1, 9, 25, 125, 1331, 18779, 389231, 11969301, 573650431, 41782304071, 4475707668912, 731606853804073, 181071469572900858
(list; graph; refs; listen; history; internal format)
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