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1, 2, 5, 12, 30, 75, 188, 470, 1175, 2938, 7345, 18362, 45905, 114762, 286905, 717262, 1793155, 4482888, 11207220, 28018050, 70045125, 175112812, 437782030, 1094455075, 2736137688, 6840344220, 17100860550, 42752151375, 106880378438
(列表;图表;参考;听;历史;文本;内部格式)
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