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0, 3, 12, 36, 108, 331, 1008, 3027, 8992, 26502, 77592, 225806, 653544, 1882224, 5396776, 15411399, 43847688, 124331457, 351448620, 990586686, 2784612380, 7808372811, 21845061504, 60983031772, 169897677504, 472435652577, 1311365875700, 3633925019190
(列表;图表;参考;听;历史;文本;内部格式)
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