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 A127184 #5 Dec 12 2012 00:34:41
%S A127184 0,1,6,68,1893
%N A127184 Number of distinct reducible characteristic polynomials of n X n real robust {0,1}-matrices.
%F A127184 a(n)=A127182(n)-A127183(n)
%Y A127184 Cf. A125587, A125593, A127182, A127183, A127186.
%K A127184 nonn
%O A127184 1,3
%A A127184 _Artur Jasinski_ and Peter Pein (petsie(AT)dordos.net), Jan 07 2007