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1, 5, 19, 67, 231, 791, 2703, 9231, 31519, 107615, 367423, 1254463, 4283007, 14623103, 49926399, 170459391, 581984767, 1987020287, 6784111615, 23162405887, 79081400319, 270000789503, 921840357375, 3147359850495, 10745758687231, 36688315047935, 125261742817279
(列表;图表;参考;听;历史;文本;内部格式)
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