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6, 30, 126, 606, 2766, 13134, 60990, 286014, 1333926, 6235950, 29160390, 136280046, 637801014, 2981709558, 13958158806, 65278026174, 305608333062, 1429710254742, 6693530115990, 31322452467006, 146644481901582, 686366924272686, 3213444320539710, 15042778398965358
(列表;图表;参考;听;历史;文本;内部格式)
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