OFFSET
0,2
COMMENTS
A 4-antipower is 4 consecutive blocks, no two of which are the same, like (11)(10)(01)(00). By "avoid" we mean the binary string has no contiguous block within it that is a 4-antipower.
LINKS
G. Fici, A. Restivo, M. Silva, and L. Q. Zamboni, Anti-powers in infinite words, arxiv preprint, 1606.02868v1 [cs.DM], June 9 2016.
Lukas Fleischer, Samin Riasat, Jeffrey Shallit, New Bounds on Antipowers in Binary Words, arXiv:1912.08147 [cs.FL], 2019.
CROSSREFS
KEYWORD
nonn
AUTHOR
Jeffrey Shallit, Jul 15 2016
STATUS
approved