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例子
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{1} ,
{1, 1},
{1, 6, 1},
{1, 15, 15, 1},
{1, 12, 18, 12, 1},
{1, 25, 30, 30, 25, 1},
{1, 18, 75, 60, 75, 18, 1},
{1, 35, 105, 175, 175, 105, 35, 1},
{1, 24, 84, 168, 210, 168, 84, 24, 1},
{1, 45, 108, 252, 378, 378, 252, 108, 45, 1},
{1, 30, 225, 360, 630, 756, 630, 360, 225, 30, 1}
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