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1, 2, 6, 12, 31, 72, 178, 430, 1071, 2654, 6680, 16858, 42926, 109778, 282490, 730028, 1895456, 4940094, 12923600, 33919416, 89301052, 235762572, 624057892, 1655817422, 4403189781, 11733247076, 31326037116, 83786187152, 224475807465
(列表;图表;参考;听;历史;文本;内部格式)
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