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1, 3, 9, 31, 111, 397, 1465, 5479, 20495, 77641, 296045, 1129451, 4337187, 16717677, 64478697, 249647575, 968902903, 3762652881, 14648257893, 57120858211, 222864458027, 871020059445, 3408282334305, 13343034152015, 52300840360703, 205189696478169, 805359505872541, 3163918570564827
(列表;图表;参考;听;历史;文本;内部格式)
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