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A146909
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Number of n X n binary arrays with all ones connected only in a 0100-1110-0111-0010 pattern in any orientation.
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0
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1, 1, 1, 3, 9, 21, 85, 553, 5197, 59067, 895397, 19192871, 570897325, 23035046469, 1263961153269, 94815577724879, 9730236725590873, 1365210979058853347
(list; graph; refs; listen; history; internal format)
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