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1, 3, 14, 63, 298, 1428, 6906, 33653, 164836, 810060, 3993446, 19727978, 97630392, 483860652, 2400763156, 11923446689, 59266186460, 294785399216, 1467099385086, 7305154655534, 36390338352432, 181345090767820, 903997336345772, 4507679568564746, 22482713911686816, 112160886877865048
(列表;图表;参考;听;历史;文本;内部格式)
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