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 A137602 #3 Mar 30 2012 17:37:44 %S A137602 3,2,6,38,44,92,66,174,108,688,120,954,300,2744,3186,2424,2070,2904, %T A137602 1080,3432,17004,1042810,8976,32232,20916,19260,76908,5284804,98064, %U A137602 281600,31320,4070868,3013472,69720,1126380,7272564,52920,316080,336840 %N A137602 a(n) is the smallest number m such that sigma(m)=n*pi(m), or 0 if no such m exists. %C A137602 There is no number m such that sigma(m)=pi(m). %e A137602 a(29)=5284804 because sigma(5284804)=29*pi(5284804) and 5284804 is the smallest such number. %Y A137602 Cf. A055234. %K A137602 easy,nonn,less %O A137602 2,1 %A A137602 _Farideh Firoozbakht_, Apr 11 2008