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1, -3, 0, 9, -12, 0, 27, -42, 0, 82, -111, 0, 207, -279, 0, 486, -630, 0, 1055, -1362, 0, 2205, -2775, 0, 4374, -5472, 0, 8427, -10389, 0, 15696, -19224, 0, 28539, -34614, 0, 50630, -61059, 0, 88119, -105483, 0, 150417, -179178, 0, 252727, -299325, 0, 418068
(列表;图表;参考文献;听;历史;文本;内部格式)
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