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1, 3, 1, 4, 6, 14, 26, 54, 105, 213, 424, 850, 1697, 3392, 6776, 13540, 27052, 54157, 108312, 216626, 433249, 866496, 1732984, 3465956, 6931884, 13863717, 27727326, 55454441, 110908456, 221816065, 443630435, 887257486, 1774508208
(列表;图表;参考;听;历史;文本;内部格式)
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