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1, 6, 9, 26, 57, 133, 306, 709, 1642, 3805, 8811, 20409, 47276, 109514, 253686, 587661, 1361316, 3153496, 7305099, 16922333, 39200767, 90809027, 210360189, 487301922, 1128840861, 2614973750, 6057619008, 14032549467, 32506574899, 75301884294
(列表;图表;参考;听;历史;文本;内部格式)
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