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1, 3, 7, 19, 46, 129, 337, 939, 2581, 7238, 20263, 57337, 162319, 461961, 1317217, 3767035, 10792400, 30983565, 89084845, 256531814, 739658815, 2135234247, 6170505666, 17849457873, 51679366171, 149750711581, 434260829464, 1260198317509, 3659410074933
(列表;图表;参考;听;历史;文本;内部格式)
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