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1, 2, 6, 26, 112, 484, 2088, 9008, 38862, 167658, 723308, 3120486, 13462360, 58079138, 250564260, 1080981064, 4663554414, 20119445656, 86799050160, 374467330636, 1615522076050, 6969664279584, 30068434774274, 129720849313094, 559639996988064, 2414391579204576
(列表;图表;参考文献;听;历史;文本;内部格式)
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