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1, 3, 6, 12, 28, 63, 144, 330, 755, 1728, 3957, 9058, 20736, 47474, 108688, 248832, 569684, 1304249, 2985984, 6836197, 15650984, 35831808, 82034362, 187811805, 429981696, 984412343, 2253741659, 5159780352, 11812948115, 27044899908, 61917364224
(列表;图表;参考;听;历史;文本;内部格式)
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