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1, 3, 10, 35, 125, 451, 1637, 5965, 21794, 79781, 292468, 1073296, 3941950, 14486721, 53264010, 195909180, 720769621, 2652351034, 9761957789, 35933354194, 132282020709, 487008295675, 1793068462212, 6602016250702, 24309222706566, 89511103102442
(列表;图表;参考;听;历史;文本;内部格式)
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