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1, 1, 1, 2, 4, 8, 17, 38, 87, 203, 482, 1160, 2822, 6929, 17149, 42736, 107144, 270060, 683940, 1739511, 4441255, 11378814, 29245927, 75386341, 194838673, 504802508, 1310843123, 3411070838, 8893590454, 23230151872, 60780378423, 159281034709
(列表;图表;参考;听;历史;文本;内部格式)
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