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1, 1, 1, 1, 1, 2, 3, 4, 5, 11, 22, 41, 72, 191, 459, 1033, 2209, 6696, 18777, 49526, 124011, 419203, 1329966, 4009931, 11544970, 43203329, 152247581, 511143253, 1644388769, 6707557342, 25952578959, 95992345048, 340793163873, 1501194339387, 6305017609678
(列表;图表;参考;听;历史;文本;内部格式)
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