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 A116208 #6 Jul 19 2021 01:19:32 %S A116208 145,384,505,820,7680,20665,29748,480340,6694209,77854665,107541513, %T A116208 109342209,132231408,174990384,183673473,213017748,289940833, %U A116208 326530608,338353345,404958673,448003540,451671060,478271265 %N A116208 Numbers k such that k concatenated with k+7 gives the product of two numbers which differ by 6. %Y A116208 Cf. A116194, A116207, A116209, A116168, A116339. %K A116208 nonn,base %O A116208 1,1 %A A116208 _Giovanni Resta_, Feb 06 2006