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2, 11, 64, 387, 2398, 15079, 95636, 609543, 3895802, 24938531, 159781864, 1024232427, 6567341398, 42116068159, 270111829436, 1732448726703, 11111915190002, 71272831185851, 457154262488464, 2932267507610067, 18808127038865998, 120639117713628439, 773804255242366436
(列表;图表;参考;听;历史;文本;内部格式)
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