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1, 1, 2, 4, 9, 19, 42, 92, 203, 453, 1018, 2300, 5224, 11919, 27301, 62750, 144662, 334392, 774802, 1799089, 4185524, 9754468, 22769099, 53225213, 124585182, 291975928, 685044632, 1608962053, 3782645385, 8901012965, 20962890607, 49409138924, 116543063346, 275086432485
(列表;图表;参考;听;历史;文本;内部格式)
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