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0, 21, 105, 5460, 26796, 1386945, 6806205, 352278696, 1728749400, 89477401965, 439095541521, 22726907820540, 111528538797060, 5772545109015321, 28327809758911845, 1466203730782071120, 7195152150224811696, 372409975073537049285, 1827540318347343259065
(列表;图表;参考;听;历史;文本;内部格式)
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