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0, 1, 2, 4, 8, 18, 40, 100, 256, 705, 2057, 6370, 20803, 71725, 259678, 985244, 3905022, 16124936, 69188809, 307765510, 1416146859, 6727549181, 32938379216, 165942445714, 859020421012, 4563322971706, 24847598243116, 138533012486423, 790075521708603, 4605183081182354
(列表;图表;参考;听;历史;文本;内部格式)
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