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 A116161 #6 Jul 20 2021 23:46:13 %S A116161 3,93,145,384,505,820,993,7680,9993,20665,29748,99993,480340,999993, %T A116161 6694209,9999993,77854665,99999993,107541513,109342209,132231408, %U A116161 174990384,183673473,213017748,289940833,326530608,338353345 %N A116161 Numbers k such that k concatenated with itself gives the product of two numbers which differ by 8. %Y A116161 Cf. A116146, A116160, A116162, A116168, A116292. %K A116161 nonn,base %O A116161 1,1 %A A116161 _Giovanni Resta_, Feb 06 2006