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2, 1, 5, 10, 20, 40, 77, 157, 314, 628, 1256, 2509, 5021, 10042, 20084, 40168, 80333, 160669, 321338, 642676, 1285352, 2570701, 5141405, 10282810, 20565620, 41131240, 82262477, 164524957, 329049914, 658099828, 1316199656, 2632399309, 5264798621, 10529597242, 21059194484, 42118388968, 84236777933, 168473555869
(列表;图表;参考;听;历史;文本;内部格式)
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