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0, 4, 12, 36, 132, 492, 1932, 7596, 30252, 120516, 481572, 1924356, 7695492, 30774372, 123089892, 492329316, 1969287012, 7877027532, 31507989612, 126031476876, 504125425932, 2016499779372, 8065997193132, 32263981077036, 129055916612652, 516223635676236
(列表;图表;参考文献;听;历史;文本;内部格式)
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