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 A055172 #5 Mar 30 2012 18:57:03 %S A055172 1,0,1,1,2,1,2,1,3,3,2,1,4,2,3,3,4,2,3,3,4,2,4,5,4,4,3,3,2,4,4,3,4,4, %T A055172 3,4,6,3 %N A055172 Number of new numbers in n-th segment of A055171; see example line of A055171. %C A055172 Also, the number of new numbers in n-th segment of A055187. %K A055172 nonn %O A055172 1,5 %A A055172 _Clark Kimberling_, Apr 27 2000