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1, 2, 7, 25, 88, 311, 1095, 3858, 13591, 47881, 168688, 594289, 2093693, 7376120, 25986209, 91549913, 322532092, 1136286727, 4003159847, 14103208628, 49685873471, 175044281583, 616684348614, 2172590743211, 7654078700221, 26965465508072, 94999850216565
(列表;图表;参考;听;历史;文本;内部格式)
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