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A146823
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Number of n X n binary arrays with all ones connected only in a 1000-1111-0100-0100 pattern in any orientation.
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0
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1, 1, 1, 9, 33, 81, 501, 9765, 253829, 5201161, 149256829, 9047294209, 886839186693, 108530571403501
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