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 A094466 #4 Oct 15 2013 22:32:23
%S A094466 1,3,5,3,19,3,7,3,11,23,5,19,6,23,7,47,6,14,6,7,15,11,43,46,10,20,6,
%T A094466 11,33,23,45,22,6,15,14,38,51,15,14,21,10,41,12,19,27,23,69,22,24,22,
%U A094466 15,14,15,14,21,26,23,55,15,14,30,20,23,87,15,14,31,26,27,139,15,14,35,20,33
%N A094466 a[n] is the smallest integer with property that phi[n+a[n]]=sigma[n].
%F A094466 Least solution to Min{x; phi[x+n]=sigma[x]}.
%e A094466 n=6:a[6]=19 because sigma[19]=20=phi[19+6]=phi[25]=20.
%e A094466 n=16:a[16]=23 because sigma[23]=24=phi[23+16]=phi[39]=24
%Y A094466 Cf. A007015, A007365.
%K A094466 nonn
%O A094466 1,2
%A A094466 _Labos Elemer_, May 11 2004