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0, 0, 2, 4, 10, 20, 44, 92, 194, 396, 820, 1684, 3432, 6972, 14144, 28636, 57890, 116828, 235500, 474304, 954444, 1919364, 3857548, 7748888, 15558988, 31229384, 62662088, 125696800, 252079196, 505423476, 1013189208, 2030729700, 4069562810, 8154257184, 16336840080, 32726819744, 65553540096
(列表；图表；参考；听；历史；文本；内部格式)
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