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A223661
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Number of nX3 0..3 arrays with row sums unimodal and column sums inverted unimodal
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1
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50, 3060, 141046, 5285887, 169756788, 4836834467, 125226945708, 2997363216275, 67192414310968, 1424909830742272, 28811928773038893, 559031955620162864, 10462533894185251783, 189688734342719058204, 3343610975591843927435
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