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0, 0, 1, 6, 29, 130, 565, 2422, 10317, 43818, 185845, 787710, 3337709, 14140594, 59904181, 253765510, 1074982605, 4553728698, 19289962933, 81713711502, 346145071085, 1466294520130, 6211324200181, 26311593418006, 111457702066509, 472142410072650
(列表;图表;参考;听;历史;文本;内部格式)
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