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0, 1, 4, 14, 47, 153, 486, 1516, 4669, 14255, 43268, 130818, 394491, 1187557, 3570850, 10728920, 32219513, 96724059, 290303232, 871171822, 2614039735, 7843167761, 23531600414, 70598995524, 211805375157, 635432902663, 1906332262396, 5719063896026, 17157325905779, 51472246152765
(列表;图表;参考;听;历史;文本;内部格式)
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