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0, 2, 6, 26, 102, 416, 1684, 6838, 27746, 112606, 456974, 1854504, 7525952, 30541874, 123945206, 502995202, 2041258182, 8283846440, 33617556212, 136426972038, 553648771426, 2246820826854, 9118062006846, 37002974944592, 150165698996096, 609403357129026, 2473084427154950
(列表;图表;参考;听;历史;文本;内部格式)
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