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A146272
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Number of n X n binary arrays with all ones connected only in a 110-111-111 pattern in any orientation.
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0
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1, 1, 5, 17, 39, 173, 3199, 51175, 661225, 13583567, 722876085, 45766294357, 3140059939559, 313372103740953, 57398488477811657, 14396095473760523773
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