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A251298
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Number of (n+1)X(6+1) 0..3 arrays with every 2X2 subblock summing to 3 6 or 9
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1
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361244, 9240612, 280654684, 10472034724, 475709341972, 25252159754868, 1492135910643272, 94429432665791560, 6236898155215652824, 423010342270840123048, 29168288863040798660104, 2032195260302124232141712
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