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 A057574 #12 Feb 02 2020 21:42:54 %S A057574 1,1,2,3,6,8,16,26,50 %N A057574 Maximal numbers of codewords in mixed code with n binary coordinates and 1 ternary coordinate with Hamming distance 3. %H A057574 Patric R. J. Östergård, <a href="https://users.aalto.fi/~pat/23.html">Classification of small binary/ternary one-error-correcting codes (Appendix)</a>, Discrete Mathematics 223 (2000), 253-262. %Y A057574 Cf. A057575-A057584, A050142. %K A057574 nonn,more %O A057574 0,3 %A A057574 _N. J. A. Sloane_, Oct 04 2000