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1, 0, 0, 0, 0, 1, 2, 2, 2, 2, 4, 7, 12, 16, 21, 29, 43, 65, 99, 142, 206, 297, 436, 641, 945, 1383, 2029, 2976, 4378, 6432, 9464, 13913, 20495, 30205, 44547, 65670, 96846, 142857, 210941, 311636, 460613, 680848, 1006682, 1488915, 2203324, 3261840, 4830671
(列表;图表;参考;听;历史;文本;内部格式)
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