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0, 0, 1, 3, 6, 11, 21, 42, 63, 105, 210, 441, 903, 1806, 2709, 4515, 9030, 18963, 38829, 77658, 116487, 194145, 388290, 815409, 1669647, 3339294, 5008941, 8348235, 16696470, 35062587, 71794821, 143589642, 215384463, 358974105, 717948210
(列表;图表;参考;听;历史;文本;内部格式)
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