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1, 2, 6, 8, 22, 40, 82, 176, 340, 722, 1450, 2966, 6096, 12362, 25384, 51728, 105698, 216074, 440962, 901396, 1840686, 3760232, 7681828, 15689962, 32053346, 65473214, 133745304, 273208346, 558081744, 1140024080, 2328745042, 4757002434, 9717279194, 19849727740
(列表;图表;参考;听;历史;文本;内部格式)
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