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1, 0, 1, 1, 2, 5, 15, 27, 76, 196, 548, 1388, 3621, 9894, 27553, 75346, 205634, 563729, 1565409, 4370226, 12191929, 33980329, 94874987, 265668404, 745652478, 2095025688, 5889310438, 16565399257, 46633521554, 131388795335, 370434641340, 1044917168292
(列表;图表;参考;听;历史;文本;内部格式)
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