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1, 2, 12, 46, 175, 610, 2107, 6918, 22256, 69498, 212649, 636910, 1874470, 5423332, 15457223, 43433088, 120467606, 330077358, 894193347, 2396636236, 6359325300, 16714566278, 43539016461, 112449776138, 288083439729, 732356943548, 1848098069644, 4630892393996
(列表;图表;参考;听;历史;文本;内部格式)
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