no. 1
Binary words avoiding the pattern AABBCABBA
RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Tome 44 (2010) no. 1, pp. 151-158

We show that there are three types of infinite words over the two-letter alphabet {0,1} that avoid the pattern AABBCABBA. These types, P, E0, and E1, differ by the factor complexity and the asymptotic frequency of the letter 0. Type P has polynomial factor complexity and letter frequency 1 2. Type E0 has exponential factor complexity and the frequency of the letter 0 is at least 0.45622 and at most 0.48684. Type E1 is obtained from type E0 by exchanging 0 and 1.

DOI : 10.1051/ita/2010010
Classification : 68R15
Keywords: combinatorics on words, letter frequency, factor complexity 
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     author = {Ochem, Pascal},
     title = {Binary words avoiding the pattern {AABBCABBA}},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {151--158},
     year = {2010},
     publisher = {EDP Sciences},
     volume = {44},
     number = {1},
     doi = {10.1051/ita/2010010},
     mrnumber = {2604940},
     zbl = {1184.68377},
     language = {en},
     url = {https://www.numdam.org/articles/10.1051/ita/2010010/}
}
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Ochem, Pascal. Binary words avoiding the pattern AABBCABBA. RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Tome 44 (2010) no. 1, pp. 151-158. doi: 10.1051/ita/2010010

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