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1, 1, 1, 2, 4, 8, 17, 37, 81, 180, 405, 917, 2090, 4795, 11054, 25589, 59475, 138712, 324483, 761163, 1790028, 4219139, 9965328, 23582735, 55906518, 132751359, 315700152, 751837207, 1792853416, 4280568845, 10232005939, 24484563844, 58650123942, 140625967460, 337488663293, 810641635789
(列表;图表;参考文献;听;历史;文本;内部格式)
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