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1, 1, 1, 3, 3, 7, 15, 43, 83, 271, 633, 3283, 9541, 54293, 204827, 1408893, 6437305, 54681853, 303651861, 3282191633, 22628378377, 297350762879, 2544553561975, 41024771076465, 431789004830701, 8608866149320377, 111456693040140865
(列表;图表;参考;听;历史;文本;内部格式)
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