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 A078149 #11 Jun 18 2025 17:37:19 %S A078149 -2,-9,-5,2,7,3,-3 %N A078149 See A078606 for the official version of this sequence. %Y A078149 Cf. A078606. %K A078149 sign,base,dead %O A078149 1,1