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 A177513 #6 Jun 12 2016 09:15:42 %S A177513 37,337,3257,32233,322573,3223357,32235223,322222757,3222222257, %T A177513 32222232577,322222232537,3222222223333,32222222332733, %U A177513 322222222237537,3222222222223373,32222222222223353,322222222222225333 %N A177513 Smallest n-digit emirp with only prime digits. %C A177513 Palindromes are not permitted. - _Harvey P. Dale_, Jun 12 2016 %Y A177513 Cf. A177514, A128388 %K A177513 nonn,base %O A177513 2,1 %A A177513 _Lekraj Beedassy_, May 10 2010 %E A177513 a(8) corrected and a(11)-a(18) from _Donovan Johnson_, Jul 30 2010