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1, 1, 1, 3, 7, 15, 45, 123, 341, 1055, 3143, 9687, 30859, 97483, 315861, 1033493, 3395089, 11316469, 37893747, 127757627, 434147079, 1481301463, 5084504675, 17536498671, 60720379293, 211194514011, 737154897245, 2581907565225, 9073734424809, 31980512271541, 113042537052043, 400634089054315, 1423370290109371
(列表;图表;参考;听;历史;文本;内部格式)
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