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1, 0, 1, 1, 1, 4, 2, 10, 10, 22, 46, 64, 167, 245, 560, 1035, 1978, 4210, 7715, 16497, 31929, 65216, 133295, 266244, 553750, 1116404, 2308931, 4738660, 9742795, 20204902, 41622910, 86539105, 179358694, 373018581, 777157221, 1618773690, 3382590684, 7065505631
(列表;图表;参考文献;听;历史;文本;内部格式)
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