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 A002394 #11 Jan 11 2021 13:22:26 %S A002394 1,0,0,7,7,0,0,1 %N A002394 Weight distribution of [ 7,4,3 ] Hamming code. %D A002394 F. J. MacWilliams and N. J. A. Sloane, The Theory of Error-Correcting Codes, Elsevier-North Holland, 1978, p. 126. %Y A002394 Row 3 of A340030. %K A002394 nonn,fini,full %O A002394 0,4 %A A002394 _N. J. A. Sloane_