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0, 1, 1, 2, 3, 6, 12, 30, 67, 159, 381, 929, 2282, 5680, 14241, 36009, 91611, 234512, 603330, 1559582, 4047956, 10546556, 27570983, 72301171, 190136444, 501323021, 1324981299, 3509660618, 9315633928, 24773632117, 65999430834, 176121938800, 470720836811, 1259936118810, 3376997883966, 9063076063854
(列表;图表;参考;听;历史;文本;内部格式)
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