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1, 3, 7, 14, 28, 57, 115, 230, 460, 921, 1842, 3685, 7371, 14743, 29486, 58973, 117947, 235894, 471789, 943579, 1887159, 3774318, 7548637, 15097274, 30194548, 60389097, 120778195, 241556391, 483112783, 966225567, 1932451134, 3864902268, 7729804536
(列表;图表;参考;听;历史;文本;内部格式)
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