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1, 3, 7, 18, 45, 114, 286, 721, 1812, 4558, 11449, 28757, 72172, 181074, 454043, 1138082, 2851369, 7141220, 17878222, 44743249, 111939780, 279966725, 700000634, 1749720020, 4372423409, 10923598469, 27283760095, 68130718351, 170093054202
(列表;图表;参考;听;历史;文本;内部格式)
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