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1, 1, 1, 1, 1, 3, 3, 8, 17, 18, 51, 69, 126, 286, 485, 1180, 2245, 4312, 7247, 19559, 41403, 66454, 161131, 337495, 710899, 1286527, 3069554, 7100614, 15046664, 29090692, 57797782, 144576706, 313441617, 628544270, 1278592587, 3304149943, 7192582862
(列表;图表;参考;听;历史;文本;内部格式)
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