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0, 1, 1, -1, -1, 5, 5, -15, -15, 55, 55, -197, -197, 727, 727, -2705, -2705, 10165, 10165, -38455, -38455, 146301, 146301, -559131, -559131, 2145025, 2145025, -8255575, -8255575, 31861025, 31861025, -123256495, -123256495, 477823895, 477823895, -1855782325, -1855782325, 7219352975
(列表;图表;参考;听;历史;文本;内部格式)
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