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0, 1, 1, 3, 8, 22, 60, 167, 465, 1307, 3682, 10422, 29593, 84291, 240663, 688685, 1974519, 5670976, 16312405, 46987424, 135514856, 391278424, 1130925409, 3271852293, 9473955776, 27454758665, 79620740071, 231064799358, 670995202298, 1949684311164, 5668282144436
(列表;图表;参考;听;历史;文本;内部格式)
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