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例子
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对于n=1,集合是{1}
对于n=2,集合是{1,2,4,7},{3,5,6}。
对于n=3,集合为{2,10,13},{4,7,8,12},{1,3,5,6,9,11}。
对于n=4,集合为{2,9,15}、{1,7,8,14}、{4,5,10,13}、{3,6,11,12}。
对于n=5,集合是{4,6,9,19},{1,13,18},}3,14,17},[2,7,8,11,16},[5,10,12,15}。
对于n=6,集合是{1,3,6,27,31},{4,12,26,30},}5,7,14,25,29},[2,8,20,22,28},[9,13,15,18,19,24},[10,11,16,17,21,23}。
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