This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A309833 #13 Oct 09 2019 09:52:04 %S A309833 4,5,7,12,20,25,39,71 %N A309833 Maximum length of a binary sequence S such that any pair of distinct subwords of length n in S is of Hamming distance at least 3. %Y A309833 Cf. A052944, A309832. %K A309833 nonn,more %O A309833 3,1 %A A309833 _Yeow Meng Chee_, Aug 19 2019