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 A055516 #3 Mar 30 2012 17:30:21 %S A055516 9,2,25,16,49,27,20,35,121,33,169,55,13,77,289,91,361,85,44,143,529, %T A055516 133,81,187,56,221,841,247,961,253,68,323,60,217,1369,391,72,437,1681, %U A055516 403,1849,493,92,551,2209,589,78,667,104,713,2809 %N A055516 Largest integer k such that k | Phi(k) + d(k) + n. %e A055516 for a(3), 16 | [ Phi(16) + d(16) + 3 ]. %K A055516 nonn %O A055516 0,1 %A A055516 _Robert G. Wilson v_, Jul 03 2000