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A269901
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Number of nX7 0..6 arrays with some element plus some horizontally or vertically adjacent neighbor totalling six exactly once.
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1
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326592, 113260615440, 21603218450171400, 3455975332370347120110, 507478639206207120857666940, 70822304244655934965133461402710, 9555836762886245973504760743477970440
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