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1, 1, 2, 5, 13, 32, 83, 225, 638, 1871, 5651, 17537, 55772, 181348, 601754, 2034368, 6997316, 24456376, 86764857, 312157366, 1137925574, 4199870789, 15683541837, 59220398058, 225982562259, 871031643495, 3389581971377, 13311468152196
(列表;图表;参考;听;历史;文本;内部格式)
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