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 A081029 #3 Mar 30 2012 17:27:18 %S A081029 1,2,3,4,6,8,12,15,18,20,24,30,36,40,42,48,60,72,84,90,120,126,144, %T A081029 180,210,240 %N A081029 Highly central numbers: numbers having a centrality higher than that of any larger number. %C A081029 A subset of A081000. %F A081029 Formula for centrality of n: A018804(n)/n^2 (cf. A080997 for fuller description of this concept). %Y A081029 Cf. A080997, A080998 for centrality rankings of the positive integers. %K A081029 nonn %O A081029 1,2 %A A081029 _Matthew Vandermast_, Mar 02 2003