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A146570
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Number of n X n binary arrays with all ones connected only in a 0100-0100-1111 pattern in any orientation.
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0
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1, 1, 1, 17, 57, 369, 6075, 152201, 4520107, 199476793, 15394540581, 1933912591517, 348262962157565
(list; graph; refs; listen; history; internal format)
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