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1, 3, 12, 42, 150, 525, 1838, 6433, 22518, 78815, 275854, 965491, 3379220, 11827271, 41395451, 144884079, 507094277, 1774829971, 6211904899, 21741667147, 76095835015, 266335422555, 932173978944, 3262608926305, 11419131242070, 39966959347247, 139884357715364, 489595252003776
(列表;图表;参考;听;历史;文本;内部格式)
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