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1, 3, 11, 45, 197, 889, 4101, 19231, 91215, 436473, 2102946, 10186704, 49561448, 241995991, 1185107619, 5818191754, 28623970526, 141074855063, 696366312010, 3441938435709, 17032200330398, 84367927756038, 418282312620433, 2075400048533778, 10304700885051731, 51196090539268890, 254493765468750694
(列表;图表;参考;听;历史;文本;内部格式)
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