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1, 1, 4, 9, 34, 94, 368, 1131, 4398, 14236, 55984, 188576, 740000, 2551442, 10067316, 35443271, 139712062, 498416468, 1971107420, 7122847862, 28153558524, 102603939062, 406431688608, 1494188962016, 5916706122284, 21880889654074, 86779037261076, 322951842854822, 1280521402780940, 4786287052515392
(列表;图表;参考;听;历史;文本;内部格式)
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