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1, 31, 620, 8991, 100750, 908052, 6767672, 42576671, 229829413, 1079371826, 4466377700, 16483884820, 54927684614, 167288627912, 471202341864, 1240559020831, 3079711709682, 7258966849915, 16333838548700, 35251970265650, 73278213928864, 147241116313756, 286838266666792
(列表;图表;参考;听;历史;文本;内部格式)
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