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 A155463 #3 Mar 30 2012 17:28:50
%S A155463 7,19,71,173,383,881,2111,5417,10691,21757,27611
%N A155463 Largest element of a set of n primes with the property that the pairwise averages are all distinct primes, having the smallest largest element (A115631).
%C A155463 The solution for n=5 is {5, 29, 53, 89, 173}, so a(5)=173. This sequence is not proved to be optimal, so smaller terms may exist.
%H A155463 Andrew Granville, <a href="http://www.dms.umontreal.ca/~andrew/PDF/PrimePatterns.pdf">Prime number patterns</a>
%Y A155463 Cf. A115631, A113832.
%K A155463 nonn
%O A155463 2,1
%A A155463 _Dmitry Kamenetsky_, Jan 22 2009