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 A078460 #5 Dec 15 2017 17:36:08 %S A078460 1,2,20,26,351,425,696 %N A078460 Initial n digits in decimal portion of the Traveling Salesman constant (A073008) form a prime number. %C A078460 a(5), a(6) and a(7) certified prime with Primo. %e A078460 a(2)=2 since 71 is prime. %Y A078460 Cf. A073008. %K A078460 more,nonn,base %O A078460 1,2 %A A078460 _Jason Earls_, Dec 31 2002