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 A116162 #6 Jul 20 2021 23:46:19 %S A116162 2,92,180,332,486,536,992,9720,9992,13220,40502,99992,941486,999992, %T A116162 2066120,2975202,9999992,77854680,99999992,123250136,162423540, %U A116162 243964010,256109750,356387462,421110162,542936282,547361900 %N A116162 Numbers k such that k concatenated with itself gives the product of two numbers which differ by 9. %Y A116162 Cf. A116153, A116161, A116169, A116293. %K A116162 nonn,base %O A116162 1,1 %A A116162 _Giovanni Resta_, Feb 06 2006