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2, 10, 48, 222, 1000, 4420, 19264, 83062, 355128, 1508028, 6368032, 26765420, 112053968, 467531272, 1945009408, 8070882982, 33414977368, 138067832332, 569466322528, 2345021291332, 9642649982128, 39598183143352, 162417965373568
(列表;图表;参考;听;历史;文本;内部格式)
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