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1, 1, 1, 1, 1, 2, 6, 16, 36, 72, 139, 283, 631, 1487, 3510, 8086, 18240, 41004, 93364, 216370, 507353, 1193113, 2799681, 6556243, 15368798, 36163695, 85483537, 202768647, 481870474, 1146143965, 2728316757, 6502751833, 15525113876, 37131739582
(列表;图表;参考;听;历史;文本;内部格式)
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