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1, 1, 1, 1, 1, 3, 6, 12, 24, 47, 94, 188, 374, 746, 1490, 2978, 5958, 11916, 23832, 47664, 95326, 190652, 381304, 762604, 1525204, 3050404, 6100804, 12201612, 24403224, 48806448, 97612896, 195225788, 390451576, 780903152, 1561806296
(列表;图表;参考;听;历史;文本;内部格式)
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