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1, 7, 23, 62, 157, 380, 889, 2037, 4589, 10205, 22465, 49038, 106285, 228985, 490791, 1047210, 2225653, 4713736, 9952272, 20954040, 44006898, 92211129, 192816394, 402420140, 838413359, 1743970009, 3622221495, 7512996836, 15563085028, 32200323371, 66548900263
(列表;图表;参考;听;历史;文本;内部格式)
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