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1, 1, 1, 4, 10, 32, 95, 306, 978, 3235, 10767, 36470, 124514, 429648, 1492944, 5225700, 18396350, 65115694, 231555165, 826956617, 2964543205, 10664540170, 38484972969, 139281469165, 505408580484, 1838442927937, 6702466323520, 24486411113076, 89630823136513, 328680670354328, 1207323483992684, 4441801238353311, 16365832987077134, 60384021404260146,223087697417538491
(列表;图表;参考;听;历史;文本;内部格式)
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