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1, 2, 4, 10, 24, 56, 130, 304, 714, 1678, 3944, 9276, 21832, 51408, 121088, 285288, 672304, 1584638, 3735596, 8807312, 20766914, 48970942, 115487946, 272371376, 642404770, 1515218012, 3574025956, 8430514614, 19886678810, 46911630678, 110664280068, 261060908326
(列表;图表;参考文献;听;历史;文本;内部格式)
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