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0, 0, 1, 1, 3, 6, 17, 41, 116, 313, 895, 2550, 7450, 21881, 65168, 195370, 591007, 1798718, 5510023, 16966529, 52506837, 163200904, 509323732, 1595311747, 5013746254, 15805787496, 49969942138, 158396065350, 503317495573, 1602973785463, 5116010587910, 16360492172347
(列表;图表;参考文献;听;历史;文本;内部格式)
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