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1, 1, 3, 4, 9, 16, 41, 78, 179, 382, 889, 1992, 4648, 10749, 25462, 59891, 142793, 340761, 819533, 1975109, 4784055, 11617982, 28316757, 69185852, 169516558, 416268547, 1024543728, 2526631078, 6242969248, 15452300967, 38310417739
(列表;图表;参考;听;历史;文本;内部格式)
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