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 A116097 #6 Jul 21 2021 22:45:44 %S A116097 92185,1453156572932210152879253333913, %T A116097 3829098407015032018435618903285,1017438814759112270449904796121753809 %N A116097 Numbers k such that k concatenated with k-9 gives the product of two numbers which differ by 5. %e A116097 92185//92176 = 96011 * 96016, where // denotes concatenation. %Y A116097 Cf. A116096, A116098, A116105, A116228. %K A116097 nonn,base %O A116097 1,1 %A A116097 _Giovanni Resta_, Feb 06 2006