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0, 1, 1, 3, 8, 22, 60, 167, 465, 1306, 3682, 10423, 29597, 84309, 240735, 688941, 1975403, 5673911, 16322021, 47018402, 135613575, 391590057, 1131902512, 3274898117, 9483405678, 27483959193, 79710664789, 231340909288, 671840817408, 1952268260256, 5676162227486
(列表;图表;参考;听;历史;文本;内部格式)
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