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1, 2, 7, 26, 108, 434, 1765, 7086, 28384, 113092, 449582, 1783092, 7062611, 27944394, 110494113, 436699670, 1725474562, 6816591452, 26927828642, 106375090796, 420248084468, 1660408588852, 6561147261682, 25930381015756, 102496390643352, 405212762977544
(列表;图表;参考;听;历史;文本;内部格式)
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