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 A238965 #11 Mar 28 2020 17:50:40 %S A238965 0,1,2,2,3,3,3,4,4,4,4,4,5,5,5,5,5,5,5,6,6,6,6,6,6,6,6,6,6,6,7,7,7,7, %T A238965 7,7,7,7,7,7,7,7,7,7,7,8,8,8,8,8 %N A238965 Duplicate of A036042. %K A238965 dead %O A238965 0,3