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1, 1, 3, 9, 30, 103, 384, 1442, 5630, 22140, 89391, 362567, 1496206, 6200980, 26010002, 109530531, 465203693, 1983050889, 8507197775, 36615589619, 158370065466, 686997801100, 2991781230521, 13062875230227, 57217563779248, 251205593841622, 1105814802393350, 4877926862758847, 21565940667871892
(列表;图表;参考;听;历史;文本;内部格式)
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