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1, 2, 8, 30, 118, 462, 1824, 7208, 28558, 113274, 449848, 1787968, 7111716, 28303548, 112700032, 448939744, 1788990454, 7131191202, 28433681832, 113398298336, 452345641820, 1804739556100, 7201621713568, 28741559322464, 114722405784428, 457971605148996, 1828422022584176
(列表;图表;参考;听;历史;文本;内部格式)
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