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A146280
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Number of n X n binary arrays with all ones connected only in a 111-110-111 pattern in any orientation.
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0
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1, 1, 5, 17, 37, 109, 2661, 46501, 480069, 5729689, 346242155, 24356919567, 1272792100111, 72738009625423, 11858558725473199, 2972962662671644607, 716003950107687603735
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