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0, 0, 0, 0, 1, 2, 4, 9, 18, 39, 80, 169, 350, 731, 1516, 3149, 6522, 13503, 27912, 57649, 118934, 245155, 504868, 1038869, 2135986, 4388487, 9009984, 18486009, 37904078, 77672299, 159072860, 325602269, 666117610, 1362061391, 2783775096, 5686854849, 11612318982
(列表;图表;参考;听;历史;文本;内部格式)
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