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1, 1, 2, 5, 12, 32, 97, 287, 885, 2942, 9626, 32224, 112848, 391780, 1383228, 5015230, 18110192, 66321124, 246631856, 916229990, 3444243002, 13061422067, 49585368476, 190049612386, 732135773261, 2827352116639, 10999281945719, 42927928170854, 168074330026869, 661650153229464, 2610848032152054
(列表;图表;参考;听;历史;文本;内部格式)
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