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1, 0, 0, 1, 2, 3, 6, 11, 21, 39, 72, 135, 252, 470, 876, 1635, 3051, 5691, 10617, 19808, 36956, 68946, 128628, 239976, 447714, 835278, 1558337, 2907320, 5424056, 10119411, 18879319, 35222285, 65712612, 122597016, 228723648, 426719269, 796110663, 1485267309, 2770995395
(列表;图表;参考;听;历史;文本;内部格式)
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