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A146264
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Number of n X n binary arrays with all ones connected only in a 110-111-110 pattern in any orientation.
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0
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1, 1, 5, 17, 45, 281, 4672, 78267, 1571678, 52679419, 3071977536, 240721783237, 27403978688452, 4744390760050525, 1239071516389632223
(list; graph; refs; listen; history; internal format)
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