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 A275686 #5 Aug 06 2016 23:25:34 %S A275686 6,427,264607,4975694077 %N A275686 Difference between the smallest 10^n-digit member of a sexy prime triple and 10^(10^n - 1). %Y A275686 Cf. A046118. %K A275686 nonn,base,hard,more %O A275686 0,1 %A A275686 _Arkadiusz Wesolowski_, Aug 05 2016