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0, 1, 2, 5, 14, 33, 90, 221, 582, 1465, 3794, 9653, 24830, 63441, 162762, 416525, 1067574, 2733673, 7003970, 17938661, 45954542, 117709185, 301527354, 772364093, 1978473510, 5067929881, 12981823922, 33253543445, 85180839134, 218195012913, 558918369450
(列表;图表;参考;听;历史;文本;内部格式)
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