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1, 1, 2, 3, 6, 10, 20, 38, 79, 162, 348, 751, 1661, 3695, 8335, 18919, 43310, 99664, 230700, 536327, 1252298, 2934508, 6900046, 16272771, 38484608, 91243851, 216839820, 516423974, 1232376315, 2946354649, 7056335478, 16926813939, 40665822366, 97836595223, 235697108115, 568531616730
(列表;图表;参考;听;历史;文本;内部格式)
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