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1, 1, 2, 5, 13, 33, 81, 196, 470, 1126, 2699, 6487, 15633, 37788, 91589, 222572, 542145, 1323446, 3237074, 7932108, 19469151, 47860083, 117819348, 290424126, 716772644, 1771035921, 4380646788, 10846386691, 26880759090, 66678169061, 165534924098, 411281773379, 1022621256416, 2544478797575, 6335428289930, 15784538365081, 39350771601502,98158461390807
(列表;图表;参考;听;历史;文本;内部格式)
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