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1, 2, 4, 9, 19, 40, 80, 165, 330, 672, 1344, 2709, 5418, 10878, 21760, 43605, 87211, 174592, 349180, 698707, 1397418, 2795520, 5591040, 11183436, 22366890, 44736512, 89473020, 178951509, 357903000, 715816960, 1431633920, 2863289683, 5726579370, 11453202383, 22906404864, 45812897109, 91625794218
(列表;图表;参考文献;听;历史;文本;内部格式)
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