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1, 1, 1, 3, 6, 10, 31, 72, 143, 448, 1113, 2420, 7607, 19644, 45166, 142062, 376222, 898670, 2825125, 7615948, 18705781, 58744868, 160472382, 402623434, 1262880382, 3485281642, 8893103765, 27858544576, 77513822785, 200511910392, 627320598639, 1757135458908, 4597279553057, 14365193348236
(列表;图表;参考;听;历史;文本;内部格式)
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