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1, -1, 1, -3, 5, -11, 27, -69, 187, -517, 1461, -4163, 11947, -34521, 100261, -292835, 859927, -2538141, 7527545, -22422647, 67055871, -201247141, 605915529, -1829583727, 5539081021, -16810214491, 51130177087, -155839985097, 475899781565, -1455898774263, 4461443964939, -13693120761789, 42089169290257, -129551061180907, 399281615409427
(列表;图表;参考;听;历史;文本;内部格式)
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