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A268970
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Number of nX7 0..2 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two not more than once.
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1
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768, 40176, 1770048, 72081792, 2799406656, 105294777120, 3870355944960, 139818682627488, 4983158127443904, 175684152567641184, 6139001133769997952, 212930705454132284064, 7339160588604264574272, 251599271436625798745568
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