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1, 1, 5, 22, 101, 476, 2282, 11075, 54245, 267592, 1327580, 6617128, 33110090, 166215895, 836761343, 4222640822, 21354409445, 108193910000, 549084400088, 2790744368660, 14203023709276, 72371208424880, 369170645788840, 1885051297844624
(列表;图表;参考;听;历史;文本;内部格式)
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