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 A214422 #10 Mar 28 2014 12:57:44 %S A214422 19,11,15,10,121 %N A214422 Least number k > 9 that is palindromic in exactly n bases b, with 2 <= b <= 10. %C A214422 There are no other terms < 10^12. The ultimate goal is to find (probably a very large) k that is palindromic in all 9 bases 2 to 10. %e A214422 19 is not palindromic in bases 2 to 10. %e A214422 11 is palindromic in base 10. %e A214422 15 is palindromic in bases 2 and 4. %e A214422 10 is palindromic in bases 3, 4, and 9. %e A214422 121 is palindromic in bases 3, 7, 8, and 10. %Y A214422 Cf. A050813, A214423, A214424, A214425, A214426 (palindromic in 0-4 bases). %K A214422 nonn,base,hard,fini %O A214422 0,1 %A A214422 _T. D. Noe_, Jul 18 2012