| 例子
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1, 1,,1,,1,,1,,1,,1,,1,,1,,1,,1,,1, ...。。。
1, 2,,2,,3,,3,,4,,4,,5,,5,,6,,6,,7, ...
1, 2,,4,,5,,7, 10,,12,,15,,19,,22,,26,,31, ...
1, 3,,5, 10, 14, 22,,30,,43,,55,,73,,91,,116, ...
1, 3,,7, 14, 26, 42,,66,,99, 143, 201, 273,,364, ...
1, 4, 10, 22, 42, 80, 132, 217, 335, 504, 728, 1038。。。。。。
。。。
。。。
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