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 A275683 #7 Apr 03 2023 10:36:13 %S A275683 4,2821,1821127,1598241813 %N A275683 Difference between the smallest 10^n-digit member of a prime triple and 10^(10^n - 1). %H A275683 G. L. Honaker, Jr. and Chris Caldwell, <a href="https://t5k.org/curios/cpage/18924.html">Prime Curios!: 10000...21127 (100-digits)</a> %H A275683 G. L. Honaker, Jr. and Chris Caldwell, <a href="https://t5k.org/curios/cpage/9641.html">Prime Curios!: 10000...41813 (1000-digits)</a> %Y A275683 Cf. A007529. %K A275683 nonn,base,hard,more %O A275683 0,1 %A A275683 _Arkadiusz Wesolowski_, Aug 05 2016