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1, 1, 2, 7, 40, 338, 3841, 54821, 939335, 18744832, 426390069, 10881017916, 307686450208, 9546443638409, 322375619648549, 11769010007246745, 461834905502223078, 19384809864763869231, 866564718107731746860, 41102477939620052536314
(列表;图表;参考;听;历史;文本;内部格式)
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