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1, 5, 25, 121, 589, 2865, 13937, 67797, 329801, 1604329, 7804317, 37964385, 184679137, 898378405, 4370194553, 21258970969, 103415040493, 503066240401, 2447184094545, 11904416380277, 57909468139689, 281702722174409, 1370353177636669, 6666133067384001, 32427647702257089, 157745476256201029
(列表;图表;参考;听;历史;文本;内部格式)
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