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1, 3, 17, 51, 417, 1251, 7089, 21267, 206657, 619971, 3513169, 10539507, 86175969, 258527907, 1464991473, 4394974419, 44854599297, 134563797891, 762528188049, 2287584564147, 18704367906849, 56113103720547, 317974254416433, 953922763249299, 9269516926920129
(列表;图表;参考;听;历史;文本;内部格式)
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