论文标题
$ n \ ne 5,7,9,10,14,17 $ n $的三元圆形无正方形单词$ n $。$
There are level ternary circular square-free words of length $n$ for $n\ne 5,7,9,10,14,17.$
论文作者
论文摘要
如果每个字母出现在相同的次数中，则为级别，加上或减1。我们给出了存在哪个级别三元圆形无正方形单词的长度表征。关键词：单词，圆形单词，项链，无平方单词，非重复序列的组合
A word is level if each letter appears in it the same number of times, plus or minus 1. We give a complete characterization of the lengths for which level ternary circular square-free words exist. Key words: combinatorics on words, circular words, necklaces, square-free words, non-repetitive sequences
