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 A138686 #4 Jun 16 2014 09:19:27 %S A138686 13,43,67,73,97,103,139,157,163,181,193,199,223,271,283,307,313,331, %T A138686 349,373,379,397,421,433,457,463,499,523,601,613,619,631,643,661,673, %U A138686 691,727,733,769,811,823,853,859,877,883,937,967,991,1021,1033,1063,1069 %N A138686 Primes in A138685. %H A138686 Alois P. Heinz, <a href="/A138686/b138686.txt">Table of n, a(n) for n = 1..10000</a> %Y A138686 Cf. A138479, A138685, A138687. %K A138686 nonn %O A138686 1,1 %A A138686 _Artur Jasinski_, Mar 26 2008