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例子
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{1},
{2, 2, 2},
{3, 6, 10, 6, 3},
{4, 12, 28, 32, 28, 12, 4},
{5, 20, 60, 100, 126, 100, 60, 20, 5},
{6, 30, 110, 240, 396, 452, 396, 240, 110, 30, 6},
{7, 42, 182, 490, 1001, 1484, 1716, 1484, 1001, 490, 182, 42, 7},
{8, 56, 280, 896, 2184, 3976, 5720, 6400, 5720, 3976, 2184, 896, 280, 56, 8},
{9, 72, 408, 1512, 4284, 9240, 15912, 21816, 24310, 21816, 15912, 9240, 4284, 1512, 408, 72, 9},
{10, 90, 570, 2400, 7752, 19320, 38760, 62880, 83980, 92252, 83980, 62880, 38760, 19320, 7752, 2400, 570, 90, 10}
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