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1, 1, 5, 17, 83, 333, 1645, 7195, 35733, 162789, 810585, 3784801, 18875529, 89559607, 447055739, 2144687329, 10711656671, 51798394103, 258799786711, 1258926493065, 6291422329465, 30743907572127, 153664965152667, 753582461828893, 3766970533585897, 18525963698745311, 92613362991207555
(列表;图表;参考;听;历史;文本;内部格式)
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