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 A043718 #8 Jun 18 2021 23:08:07 %S A043718 1,2,3,4,5,6,7,8,9,10,11,12,13,14,16,32,48,64,80,96,112,128,144,160, %T A043718 176,192,208,224,226,227,228,229,230,231,232,233,234,235,236,237,238, %U A043718 239,241,255,256,258,259,260,261,262,263,264,265 %N A043718 Numbers whose base-15 representation has an odd number of runs. %K A043718 nonn,base %O A043718 1,2 %A A043718 _Clark Kimberling_