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2, 7, 34, 200, 1318, 9354, 69864, 541323, 4310950, 35066384, 290081932, 2432766082, 20635672664, 176727482860, 1526000459400, 13270616752680, 116124930068670, 1021736927603190, 9033726534916920, 80220639767921370, 715166816624282820, 6398357633173869600
(列表;图表;参考;听;历史;文本;内部格式)
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