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1, 1, 2, 4, 7, 14, 27, 56, 116, 253, 557, 1272, 2948, 6998, 16856, 41306, 102449, 257294, 652566, 1670679, 4311109, 11206278, 29316294, 77144518, 204072054, 542446974, 1448230644, 3882179984, 10445521740, 28202158173, 76387639678
(列表;图表;参考;听;历史;文本;内部格式)
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