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A234192
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Number of (n+2)X(2+2) 0..3 arrays with no increasing sequence of length 3 horizontally, diagonally downwards or antidiagonally downwards
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1
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8978872, 1577067369, 272785548513, 47114152181148, 8128987583933281, 1402354682135036305, 241907393209732474040, 41728691066349914499057, 7198106124765939948074277, 1241655935620049816080983368
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