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1, 17, 145, 836, 3846, 15002, 52132, 164576, 484609, 1337597, 3521517, 8850458, 21485321, 50358968, 114911640, 255114977, 554333346, 1178070741, 2459840199, 5042845917, 10185374250, 20257833206, 39778823250, 77088115856, 147739793527, 279923493220
(列表;图表;参考;听;历史;文本;内部格式)
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