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 A052017 #10 Oct 17 2019 22:37:34 %S A052017 2,3,5,7,23,67,89,4567,23456789 %N A052017 Primes with digits in ascending order that differ exactly by 1. %C A052017 Primes in A138141. - _Omar E. Pol_, Dec 07 2008 %Y A052017 Cf. A052016, A048398, A006055. %Y A052017 Cf. A138141. - _Omar E. Pol_, Dec 07 2008 %K A052017 nonn,base,fini,full %O A052017 1,1 %A A052017 _Patrick De Geest_, Nov 15 1999