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2, 6, 10, 16, 21, 44, 82, 144, 273, 531, 1032, 1960, 3805, 7446, 14505, 28254, 55311, 108511, 212645, 417039, 819145, 1609692, 3163058, 6217976, 12229218, 24055201, 47320658, 93104592, 183213156, 360551489, 709578685, 1396577604, 2748853048
(列表;图表;参考;听;历史;文本;内部格式)
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