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1, -1, 3, -7, 17, -39, 93, -219, 517, -1219, 2877, -6787, 16013, -37779, 89133, -210291, 496141, -1170547, 2761677, -6515635, 15372365, -36268083, 85567437, -201879603, 476295373, -1123725619, 2651210445, -6255011635, 14757474509, -34817369907, 82144763085, -193804475187
(列表;图表;参考;听;历史;文本;内部格式)
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