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1, 2, 3, 6, 12, 18, 42, 60, 144, 264, 510, 1062, 1572, 2634, 5778, 12024, 22008, 45852, 67860, 159852, 227712, 387564, 842988, 1765860, 3543828, 7041516, 13809468, 27778788, 55397724, 104027496, 211598820, 426741468, 849939108, 1696334388, 3385627260, 6785383692
(列表;图表;参考;听;历史;文本;内部格式)
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