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 A157837 #3 Mar 31 2012 10:26:07 %S A157837 13,37,79,739,769,32887,186889,3748879,92888699,3778889899, %T A157837 727777887889889 %N A157837 Smallest emirp with multiplicative persistence n. %Y A157837 Cf. A046500 %K A157837 nonn,base %O A157837 1,1 %A A157837 _Lekraj Beedassy_, Mar 07 2009 %E A157837 Corrected a(11). _Lekraj Beedassy_, Mar 10 2009 %E A157837 a(8) and a(11) corrected by _Ray Chandler_, Mar 12 2009