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1, 4, 12, 48, 144, 576, 1728, 6912, 20736, 82944, 248832, 995328, 2985984, 11943936, 35831808, 143327232, 429981696, 1719926784, 5159780352, 20639121408, 61917364224, 247669456896, 743008370688, 2972033482752, 8916100448256, 35664401793024, 106993205379072, 427972821516288
(列表;图表;参考;听;历史;文本;内部格式)
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