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 A046478 #17 Apr 10 2021 22:19:33 %S A046478 2,3,5,7,191,373,3106013,1400232320041 %N A046478 Primes that are palindromic in bases 9 and 10. %H A046478 Patrick De Geest, <a href="http://www.worldofnumbers.com/palpri.htm">World!Of Palindromic Primes</a> %e A046478 373_10 = 454_9. - _Jon E. Schoenfield_, Apr 10 2021 %Y A046478 Cf. A002385, A029965. %K A046478 nonn,hard,base %O A046478 1,1 %A A046478 _Patrick De Geest_, Aug 15 1998