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1, 2, 6, 17, 50, 143, 416, 1199, 3474, 10048, 29112, 84347, 244630, 709767, 2060754, 5986231, 17399060, 50595235, 147199567, 428448576, 1247613511, 3634451971, 10591746511, 30878554201, 90053295475, 262716880036, 766682072349, 2238077375703, 6535237181868
(列表;图表;参考;听;历史;文本;内部格式)
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