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1, 3, 6, 13, 24, 49, 90, 181, 335, 671, 1253, 2507, 4718, 9437, 17874, 35749, 68067, 136135, 260337, 520675, 999361, 1998723, 3848221, 7696443, 14857999, 29715999, 57500459, 115000919, 222981434, 445962869, 866262914, 1732525829, 3370764539, 6741529079, 13135064249
(列表;图表;参考;听;历史;文本;内部格式)
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