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A146933
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Number of n X n binary arrays with all ones connected only in a 1111-1111 pattern in any orientation.
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0
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1, 1, 1, 7, 25, 89, 559, 4332, 47525, 720844, 13515353, 345530332, 11945906159, 546900316419, 33704239869671, 2765958377374818
(list; graph; refs; listen; history; internal format)
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