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0, 1, 1, 3, 8, 22, 61, 168, 465, 1302, 3659, 10333, 29255, 83096, 236609, 675311, 1931235, 5532421, 15873557, 45608348, 131208906, 377906025, 1089573851, 3144456980, 9082730826, 26256633715, 75960348880, 219905556560, 637038643771, 1846531053341, 5355395451034
(列表;图表;参考;听;历史;文本;内部格式)
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