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0, 1, 1, 3, 8, 22, 60, 167, 465, 1306, 3681, 10423, 29598, 84313, 240753, 689013, 1975659, 5674795, 16324964, 47028023, 135644560, 391688795, 1132214229, 3275875477, 9486452270, 27493411521, 79739873360, 231430860268, 672117013805, 1953114161607, 5678747123701
(列表;图表;参考;听;历史;文本;内部格式)
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