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0, 0, 1, 2, 4, 7, 14, 25, 45, 84, 154, 290, 549, 1043, 1990, 3820, 7352, 14198, 27473, 53327, 103697, 201926, 393781, 769123, 1503776, 2943595, 5767727, 11310982, 22200249, 43604981, 85706123, 168562900, 331717805, 653148282, 1286697640
(列表;图表;参考;听;历史;文本;内部格式)
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